EP1345675A1 - Kationen-/protonenleitende, mit einer ionischen flüssigkeit infiltrierte keramische membran, verfahren zu deren herstellung und die verwendung der membran - Google Patents
Kationen-/protonenleitende, mit einer ionischen flüssigkeit infiltrierte keramische membran, verfahren zu deren herstellung und die verwendung der membranInfo
- Publication number
- EP1345675A1 EP1345675A1 EP01270378A EP01270378A EP1345675A1 EP 1345675 A1 EP1345675 A1 EP 1345675A1 EP 01270378 A EP01270378 A EP 01270378A EP 01270378 A EP01270378 A EP 01270378A EP 1345675 A1 EP1345675 A1 EP 1345675A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- conducting
- ion
- acids
- composite material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 149
- 239000002608 ionic liquid Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000919 ceramic Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000446 fuel Substances 0.000 claims abstract description 35
- 150000001768 cations Chemical class 0.000 claims abstract description 20
- 239000002131 composite material Substances 0.000 claims description 119
- 150000001875 compounds Chemical class 0.000 claims description 60
- -1 phosphonium ion Chemical class 0.000 claims description 53
- 150000003839 salts Chemical class 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 34
- 239000000203 mixture Substances 0.000 claims description 34
- 239000004020 conductor Substances 0.000 claims description 33
- 239000002253 acid Substances 0.000 claims description 28
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims description 24
- 229910052726 zirconium Inorganic materials 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 229920000642 polymer Polymers 0.000 claims description 21
- 150000002500 ions Chemical class 0.000 claims description 17
- 229910052719 titanium Inorganic materials 0.000 claims description 17
- 239000010936 titanium Substances 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 15
- 150000007513 acids Chemical class 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 13
- 229910052804 chromium Inorganic materials 0.000 claims description 13
- 229910052748 manganese Inorganic materials 0.000 claims description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 229910052727 yttrium Inorganic materials 0.000 claims description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 11
- 239000004697 Polyetherimide Substances 0.000 claims description 11
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 229920001601 polyetherimide Polymers 0.000 claims description 11
- 239000002033 PVDF binder Substances 0.000 claims description 10
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 10
- 239000011707 mineral Substances 0.000 claims description 10
- 150000003009 phosphonic acids Chemical class 0.000 claims description 10
- 229920002492 poly(sulfone) Polymers 0.000 claims description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
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- 150000004760 silicates Chemical class 0.000 claims description 10
- 150000003460 sulfonic acids Chemical class 0.000 claims description 10
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical class [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000007848 Bronsted acid Substances 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 229910052718 tin Inorganic materials 0.000 claims description 9
- 229910052721 tungsten Inorganic materials 0.000 claims description 9
- 229910052720 vanadium Inorganic materials 0.000 claims description 9
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 8
- 150000001735 carboxylic acids Chemical class 0.000 claims description 8
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 8
- 239000011368 organic material Substances 0.000 claims description 8
- 229910052700 potassium Inorganic materials 0.000 claims description 8
- 229910052708 sodium Inorganic materials 0.000 claims description 8
- 125000005402 stannate group Chemical group 0.000 claims description 8
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 8
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical class [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 7
- 150000004645 aluminates Chemical class 0.000 claims description 7
- 229910052787 antimony Inorganic materials 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 7
- 239000011147 inorganic material Substances 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 235000021317 phosphate Nutrition 0.000 claims description 7
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 7
- 150000003871 sulfonates Chemical class 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 150000001450 anions Chemical class 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-O Imidazolium Chemical compound C1=C[NH+]=CN1 RAXXELZNTBOGNW-UHFFFAOYSA-O 0.000 claims description 5
- 229910002651 NO3 Inorganic materials 0.000 claims description 5
- 125000003118 aryl group Chemical group 0.000 claims description 5
- 238000005868 electrolysis reaction Methods 0.000 claims description 5
- SIFIMQMTABTXMD-UHFFFAOYSA-N silylphosphonic acid Chemical class OP(O)([SiH3])=O SIFIMQMTABTXMD-UHFFFAOYSA-N 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 4
- 238000006555 catalytic reaction Methods 0.000 claims description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 4
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-O pyridinium Chemical compound C1=CC=[NH+]C=C1 JUJWROOIHBZHMG-UHFFFAOYSA-O 0.000 claims description 4
- IGGHSANJNRYSQB-UHFFFAOYSA-N OS([SiH3])(=O)=O Chemical class OS([SiH3])(=O)=O IGGHSANJNRYSQB-UHFFFAOYSA-N 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 claims description 3
- 238000000909 electrodialysis Methods 0.000 claims description 3
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 claims description 3
- 150000002576 ketones Chemical class 0.000 claims description 3
- 150000002926 oxygen Chemical class 0.000 claims description 3
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims description 3
- 150000002170 ethers Chemical class 0.000 claims 1
- 229920005862 polyol Polymers 0.000 claims 1
- 150000003077 polyols Chemical class 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 26
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 24
- 239000000243 solution Substances 0.000 description 22
- 239000000725 suspension Substances 0.000 description 22
- 239000007788 liquid Substances 0.000 description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 15
- 238000011282 treatment Methods 0.000 description 15
- 239000002245 particle Substances 0.000 description 10
- 230000007062 hydrolysis Effects 0.000 description 8
- 238000006460 hydrolysis reaction Methods 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 150000002736 metal compounds Chemical class 0.000 description 8
- 229920000867 polyelectrolyte Polymers 0.000 description 8
- 239000010457 zeolite Substances 0.000 description 8
- 239000004696 Poly ether ether ketone Substances 0.000 description 7
- 230000008595 infiltration Effects 0.000 description 7
- 238000001764 infiltration Methods 0.000 description 7
- 229920002530 polyetherether ketone Polymers 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 230000002378 acidificating effect Effects 0.000 description 6
- 239000003570 air Substances 0.000 description 6
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- 229910052750 molybdenum Inorganic materials 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 229920001643 poly(ether ketone) Polymers 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 229910052732 germanium Inorganic materials 0.000 description 4
- 229910052745 lead Inorganic materials 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000002894 organic compounds Chemical class 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 description 4
- NJMWOUFKYKNWDW-UHFFFAOYSA-N 1-ethyl-3-methylimidazolium Chemical compound CCN1C=C[N+](C)=C1 NJMWOUFKYKNWDW-UHFFFAOYSA-N 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910000323 aluminium silicate Inorganic materials 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
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- 229910001960 metal nitrate Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229930014626 natural product Natural products 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
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- 229910052711 selenium Inorganic materials 0.000 description 3
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- 229910052714 tellurium Inorganic materials 0.000 description 3
- POILWHVDKZOXJZ-ARJAWSKDSA-M (z)-4-oxopent-2-en-2-olate Chemical compound C\C([O-])=C\C(C)=O POILWHVDKZOXJZ-ARJAWSKDSA-M 0.000 description 2
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- WYTQXLFLAMZNNZ-UHFFFAOYSA-N 3-trihydroxysilylpropane-1-sulfonic acid Chemical compound O[Si](O)(O)CCCS(O)(=O)=O WYTQXLFLAMZNNZ-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- 239000003341 Bronsted base Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000002841 Lewis acid Substances 0.000 description 2
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- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- VWRGMNBAAXEDPJ-UHFFFAOYSA-N [Si+2]=O.[O-2].[V+5] Chemical compound [Si+2]=O.[O-2].[V+5] VWRGMNBAAXEDPJ-UHFFFAOYSA-N 0.000 description 2
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical class O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 2
- WAXDNUVIPREAOK-UHFFFAOYSA-N aluminum methylsilicon(3+) oxosilicon(2+) oxygen(2-) Chemical compound C[Si+3].[Si+2]=O.[O-2].[Al+3].[O-2].[O-2].[O-2] WAXDNUVIPREAOK-UHFFFAOYSA-N 0.000 description 2
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- PDTMBLJRIXXJMH-UHFFFAOYSA-L disodium;dioxido-oxo-(trihydroxysilylmethyl)-$l^{5}-phosphane Chemical compound [Na+].[Na+].O[Si](O)(O)CP([O-])([O-])=O PDTMBLJRIXXJMH-UHFFFAOYSA-L 0.000 description 1
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
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- 239000011490 mineral wool Substances 0.000 description 1
- 229910003455 mixed metal oxide Inorganic materials 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- LMHHRCOWPQNFTF-UHFFFAOYSA-N s-propan-2-yl azepane-1-carbothioate Chemical compound CC(C)SC(=O)N1CCCCCC1 LMHHRCOWPQNFTF-UHFFFAOYSA-N 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- 150000003377 silicon compounds Chemical group 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 125000005373 siloxane group Chemical group [SiH2](O*)* 0.000 description 1
- WTMNSNRISDDHPC-UHFFFAOYSA-N silylsulfonylsilane Chemical compound [SiH3]S([SiH3])(=O)=O WTMNSNRISDDHPC-UHFFFAOYSA-N 0.000 description 1
- 239000012453 solvate Substances 0.000 description 1
- 229910052566 spinel group Inorganic materials 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- 125000002088 tosyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1C([H])([H])[H])S(*)(=O)=O 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
- LEHFSLREWWMLPU-UHFFFAOYSA-B zirconium(4+);tetraphosphate Chemical class [Zr+4].[Zr+4].[Zr+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LEHFSLREWWMLPU-UHFFFAOYSA-B 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0289—Means for holding the electrolyte
- H01M8/0293—Matrices for immobilising electrolyte solutions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
- B01D53/326—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 in electrochemical cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
- B01D67/0048—Inorganic membrane manufacture by sol-gel transition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
- B01D69/107—Organic support material
- B01D69/1071—Woven, non-woven or net mesh
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/10—Supported membranes; Membrane supports
- B01D69/108—Inorganic support material
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/14—Dynamic membranes
- B01D69/141—Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes
- B01D69/142—Heterogeneous membranes, e.g. containing dispersed material; Mixed matrix membranes with "carriers"
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/0213—Silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/0215—Silicon carbide; Silicon nitride; Silicon oxycarbide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/024—Oxides
- B01D71/027—Silicium oxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D71/02—Inorganic material
- B01D71/04—Glass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0278—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0278—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre
- B01J31/0281—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre the nitrogen being a ring member
- B01J31/0284—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre the nitrogen being a ring member of an aromatic ring, e.g. pyridinium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0287—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing atoms other than nitrogen as cationic centre
- B01J31/0288—Phosphorus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0292—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature immobilised on a substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/58—Fabrics or filaments
- B01J35/59—Membranes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/20—Manufacture of shaped structures of ion-exchange resins
- C08J5/22—Films, membranes or diaphragms
- C08J5/2206—Films, membranes or diaphragms based on organic and/or inorganic macromolecular compounds
- C08J5/2275—Heterogeneous membranes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B13/00—Diaphragms; Spacing elements
- C25B13/04—Diaphragms; Spacing elements characterised by the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/26—Electrical properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2339/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Derivatives of such polymers
- C08J2339/04—Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a cation- or proton-conducting membrane, a process for its production and its use, in particular in a fuel cell.
- Inorganic proton conductors are also known from the literature (see, for example, "Proton Conductors", P. Colomban, Cambridge University Press, 1992), but these mostly show Low conductivities (such as zirconium phosphates or phosphonates, heteropolyacids and glassy systems or xerogels) or conductivity only reaches technically useful values at high temperatures, typically at temperatures above 500 ° C, such as defect perovskites.
- the object of the present invention was therefore to provide a cation- / proton-conducting membrane which shows good conductivity for protons or cations and has a low permeability for methanol and for the further reaction gases (such as H 2 , O 2 ).
- ceramic ion-conducting membranes which have an ionic liquid also have good protons or temperatures at temperatures above 100 ° C. Have cation conductivities. Such membranes also have a low permeability to methanol and are still gas-tight even at high pressures.
- the present invention therefore relates to a cation- / proton-conducting membrane which has a composite material based on at least one perforated and permeable support, the membrane having an ionic liquid in the cavities.
- the present invention also relates to a method for producing a membrane, a composite material based on at least one perforated and permeable support, characterized in that a membrane is completely or partially infiltrated with an ionic liquid.
- the present invention also relates to the use of a membrane according to claim 1 as an electrolyte membrane in a fuel cell, as a catalyst for acid or base-catalyzed reactions, as a membrane in electrodialysis, membrane electrolysis or electrolysis.
- WO 00/20115 and WO 00/16902 have known ionic liquids (IL) in the field of catalysis for several years.
- Ionic liquids are molten salts, which preferably solidify only at temperatures below room temperature.
- Welton Chem. Rev. 1999, 99, 2071). Essentially, these are imidazolium or pyridinium salts.
- the proton cation-conducting membranes according to the invention have the advantage that they can be used at substantially higher temperatures than conventional proton-conducting membranes. This is achieved in particular in that the ionic liquid (IL) takes on the role of water as an H + carrier (H + carrier), ie solvates the “naked” protons. Since the ionic liquids can have a significantly higher boiling point than water "The proton / cation conducting membranes according to the invention containing ionic liquids are particularly suitable to be used as membranes in fuel cells according to the reformate or DMFC principle. By using the membranes according to the invention, fuel cells are accessible which are characterized by high power densities at high temperatures in an anhydrous atmosphere.
- WO99 / 62620 first described the production of an ion-conducting, permeable composite material based on a ceramic and its use.
- the steel mesh described in WO99 / 62620 as the carrier to be preferably used is, however, absolutely unsuitable for the use of the composite material as a membrane in fuel cells, since during operation of the fuel cell short circuits between the two are very easy Electrodes are created.
- this composite material would also have to be as impermeable as possible to the protons or cations desired, and in extreme cases to be absolutely impermeable.
- the proton- or cation-conducting membranes according to the invention can be ceramic or glass-like membranes and are described below by way of example, without being restricted to these types of embodiments.
- the proton- or cation-conducting membrane according to the invention is characterized in that there is at least one inorganic component on the carrier and in the interior of the carrier of the composite material, which essentially contains at least one compound made of a metal, a semimetal or a mixed metal with at least one element which has 3rd to 7th main group.
- Composites which have ion-conducting properties can be used as are known from WO 99/62620.
- the interior of a carrier is understood to mean cavities or pores in a carrier.
- the openwork and permeable support can have spaces with a size of 0.5 nm to 500 microns.
- the gaps can be pores, meshes, holes or other voids.
- the carrier can have at least one material selected from glasses,
- Carriers which can have the aforementioned materials can have been modified by a chemical, thermal or mechanical treatment method or a combination of the treatment methods.
- the aforementioned materials can have been modified by a chemical, thermal or mechanical treatment method or a combination of the treatment methods.
- the treatment methods Preferably, the
- Composite material has a carrier which has at least one glass, a ceramic, a natural fiber or a plastic.
- the composite material very particularly preferably has at least one carrier which has at least interwoven, bonded, matted or ceramic-bonded fibers, or at least sintered or bonded moldings, balls or particles.
- Permeable supports can also be those which become permeable or have been made by laser treatment or ion beam treatment. It can be advantageous if the carrier is made of a fleece or fabric of fibers from at least one material selected from ceramics, glasses, minerals, plastics, amorphous substances, composites and natural products or fibers from at least a combination of these materials, such as asbestos, glass fibers , Rock wool fibers, polyamide fibers, coconut fibers, coated fibers.
- Carriers are preferably used which have woven glass fibers.
- the composite material very particularly preferably has a carrier which has at least one fabric made of glass, the fabrics preferably consisting of 11-Tex yarns with 5-50 warp or weft threads and preferably 20-28 warp and 28-36 weft threads , 5.5-Tex yarns with 10-50 warp or weft threads and preferably 20-28 warp and 28-36 weft threads are very preferably used.
- the carrier can also have at least one granular, sintered glass or glass fleece with a pore size of 0.1 ⁇ m to 500 ⁇ m, preferably 3 to 60 ⁇ m.
- the composite material preferably has at least one support made of a glass, which has at least one compound from the series SiO 2 , Al 2 O 3 and MgO.
- the carrier can also consist of at least one ceramic from the series Al 2 O 3 , ZrO 2 , TiO 2 , SiO 2 , Si 3 N, SiC, BN.
- the inorganic component present in the membrane according to the invention, from which the composite material is made up can have at least one compound of at least one metal, semimetal or mixed metal with at least one element of the 3rd to 7th main group of the periodic table or at least a mixture of these compounds.
- the compounds of the metals, semimetals or mixed metals can contain at least elements of the subgroup elements and the 3rd to 5th main group or at least elements of the subgroup elements or the 3rd to 5th main group, these compounds having a particle size of 0.001 to 25 ⁇ m.
- the inorganic component preferably has at least one compound of an element of the 3rd to 8th subgroup or at least one element of the 3rd to 5th main group with at least one of the elements Te, Se, S, O, Sb, As, P, N, Ge , Si, C, Ga, AI or B or at least one connection of an element of the 3rd to 8th subgroup and at least one element of the 3rd to 5th main group with at least one of the elements Te, Se, S, O, Sb, As, P, N, Ge, Si , C, Ga, Al or B or a mixture of these compounds.
- the inorganic component particularly preferably has at least one compound of at least one of the elements Sc, Y, Ti, Zr, V, Nb, Cr, Mo, W, Mn, Fe, Co, B, Al, Ga, In, Tl, Si, Ge , Sn, Pb, Sb or Bi with at least one of the elements Te, Se, S, O, Sb, As, P, N, C, Si, Ge or Ga, such as TiO 2 , Al 2 O 3 , SiO 2 , ZrO 2 , Y 2 O 3 , B 4 C, SiC, Fe 3 O 4 , Si 3 N 4 , BN, SiP, nitrides, sulfates, phosphides, silicides, spinels or yttrium aluminum garnet, or one of these elements itself.
- the inorganic component can also be aluminosilicates, aluminum phosphates, zeolites or partially exchanged zeolites, such as ZSM-5, Na-ZSM-5 or Fe-ZSM-5, amorphous microporous mixed oxides, which can contain up to 20% non-hydrolyzable organic compounds, such as eg vanadium oxide-silicon oxide glass or aluminum oxide-silicon oxide-methyl silicon sesquioxide glasses, or glasses in the system W-Si-Zr-P-Ti-0.
- aluminosilicates aluminum phosphates
- zeolites or partially exchanged zeolites such as ZSM-5, Na-ZSM-5 or Fe-ZSM-5
- amorphous microporous mixed oxides which can contain up to 20% non-hydrolyzable organic compounds, such as eg vanadium oxide-silicon oxide glass or aluminum oxide-silicon oxide-methyl silicon sesquioxide glasses, or glasses in the system W-Si-Zr-P-Ti
- At least one inorganic component is preferably present in a grain size fraction with a grain size of 1 to 250 nm or with a grain size of 260 to 10,000 nm.
- the composite material has at least two grain size fractions of at least one inorganic component. It can also be advantageous if the composite material has at least two grain size fractions of at least two inorganic components.
- the grain size ratio can be from 1: 1 to 1: 10,000, preferably from 1: 1 to 1: 100.
- the quantitative ratio of the grain size fractions in the composite material can preferably be from 0.01: 1 to 1: 0.01
- the membrane according to the invention is distinguished by the fact that it has ion-conducting properties and is ion-conducting in particular at a temperature of from -40 ° C. to 350 ° C., preferably from -10 ° C. to 200 ° C.
- the composite material has at least one inorganic and / or organic material that has ion-conducting properties.
- This ion-conducting material can be contained in the composite material as an admixture.
- the inner and / or outer surfaces of the particles present in the composite material are coated with a layer of an inorganic and or organic material.
- Such layers have a thickness of 0.0001 to 10 ⁇ m, preferably a thickness of 0.001 to 0.5 ⁇ m. It is also possible that the composite material consists entirely or partially of the materials mentioned.
- At least one inorganic and / or organic material which has ion-conducting properties is present in the intermediate grain volumes of the composite material. This material partially, preferably almost completely, fills the intercom volume. In particular, at least one inorganic and / or organic material which has ion-conducting properties fills the interstices of the composite material.
- the material having ion-conducting properties contains sulfonic acids, phosphonic acids, carboxylic acids or their salts individually or as a mixture.
- the sulfonic or phosphonic acids, silylsulfonic acids or silylphosphonic acids are preferred.
- These ionic groups can be organic compounds chemically and / or physically bound to inorganic particles, such as Al 2 O 3 , SiO 2 , ZrO 2 or TiO 2 .
- the ionic groups are preferably connected via aryl and / or alkyl chains to the inner and / or outer surface of the particles present in the composite material.
- the trihydroxysifylsulfonic acid carrying the SO 3 H group is incorporated into the inorganic network via the hydrolyzed preform of SiO 2 .
- the ion-conducting material of the composite material can also be an organic ion-conducting material, such as a polymer.
- a polymer is a sulfonated polytetrafluoroethylene, sulfonated polyvinylidene fluoride, a, a ammolysêts polytetrafluoroethylene, a ammolysêts polyvinylidene fluoride, sulfonated polysulfone, a ammolysêts polysulfone, sulfonated polyetherimide, a polyetherimide ammolystechnischs, a sulfonated polyether or polyether ether ketone, a aminolyzed Polyether or polyether ether ketone or a mixture of these polymers.
- At least one compound from the group of oxides, oxygen acids, phosphates, phosphides, phosphonates, sulfates, sulfonates, hydroxysilyl acids, sulfoaryl phosphonates, vanadates, stannates, plumbates, chromates, tungstates, molybdates, manganates, titanates, silicates, can be used as inorganic ion-conducting materials in the composite material.
- Aluminosilicates, zeolites and aluminates and their salts or mixtures of these compounds at least one of the elements Al, Si, P, Sn, Sb, K, Na, Ti, Fe, Zr, Y, V, W, Mo, Ca, Mg, Li, Contain Cr, Mn, Co, Ni, Cu or Zn or a mixture of these elements.
- Ni, Cu or Zn or a mixture of these elements may be present. At least one amorphous and / or crystalline is preferred as the inorganic ion-conducting material
- the inorganic ion-conducting materials can also be a compound from the group of zirconium, cerium or titanium phosphates, phosphonates or sulfoaryl phosphonates and their salts or
- the membrane according to the invention can be flexible.
- the ion-conducting composite material or the membrane is preferably bendable to a minimum radius of 25 mm, preferably 10 mm, particularly preferably 5 mm. If the membranes according to the invention are to be used as electrolyte membranes in fuel cells, they should have the lowest possible total resistance.
- the proton- or cation-conducting ceramic membranes according to the invention have a composite material with high porosity, which can be infiltrated with at least one ionic liquid. The total resistance of the membrane depends not only on the porosity but also on the thickness of the membrane.
- a membrane according to the invention therefore preferably has one Composite material with a thickness of less than 200 ⁇ m, preferably less than 100 ⁇ m and very particularly preferably less than 5 or 20 ⁇ m.
- the cation- or proton-conducting membrane according to the invention has at least one ionic liquid.
- ionic liquids have already been described. An overview of ionic liquids is given e.g. Welton (Chem. Rev. 1999, 99, 2071) and Wasserscheid et al. (Angew. Chem. 2000, 112, 3026-3945). In general, ionic liquids are understood to be salts which are present as a liquid at normal use temperatures.
- the ionic liquids used in the membranes according to the invention preferably contain at least one salt, having as the cation an imidazolium, a pyridinium, an ammonium or phosphonium ion with the following structures:
- anion-cation combinations that can be suitable as ionic liquids.
- salts with certain properties, such as melting point and thermal stability, can be produced.
- the ionic liquid itself is a Bronsted acid or its salt and thus serves as a proton / Cation source or contains a Bronsted acid or its salts, which serve as a proton / cation source.
- the membranes according to the invention preferably have from 0.1 to 50% by weight, particularly preferably from 1 to 10% by weight, of ionic liquids.
- the ceramic membranes according to the invention very particularly preferably have the salts specified in the table below as ionic liquid.
- the table also shows the melting points of the salts.
- the salts can be prepared according to Welton (Chem. Rev. 1999, 99, 2071) and Wasserscheid et al. (Angew. Chem. 2000, 112, 3026-3945), or the literature cited in these papers.
- EMIM 1-ethyl-3-methylimidazolium ion
- BMIM 1-butyl-3-methylimidazolium ion
- MMIM 1-methyl-3-methylimidazolium ion
- Ts H3CC6H4SO2 (tosyl)
- Oc octyl
- Et ethyl
- Me methyl
- Bu n-butyl
- CF 3 SO 3 triflate anion
- Ph phenyl
- the proton or cation-conducting membrane according to the invention has the ionic liquids as a liquid or solidified liquid at room temperature, ie as a solid.
- the use of a membrane according to the invention, in which the ionic liquid is present as a solid at room temperature, in a fuel cell is possible if the operating temperature of the fuel cell is higher than the melting point of the ionic liquid during operation of the fuel cell.
- the use of a membrane according to the invention in a fuel cell is only possible if the ionic liquid is stable to hydrolysis. Membranes which have ionic liquids and which have a chloroaluminate ion as an anion are therefore less suitable, since these ionic liquids are very unstable to hydrolysis.
- the ionic liquids can also contain a compound which serves as a proton or cation source. These compounds can either be dissolved or suspended in the ionic liquid. Acids or their salts, as well as a compound from the group Al O 3 , ZrO, SiO 2 , P 2 O 5 or TiO 2 , the zirconium or titanium phosphates, phosphonates or sulfoaryl phosphonates, the vanadates, can be used as the proton or cation source.
- the method according to the invention for producing an ion-conducting membrane is described below by way of example, without the method according to the invention being restricted to this production.
- the proton- or cation-conducting ceramic membranes according to the invention, which have at least one ionic liquid can be produced in various ways.
- composite materials which have ion-conducting properties can be used in the production of the membranes according to the invention and can be treated with an ionic liquid which can additionally contain an ion-conducting material.
- permeable composite materials which have no ion-conducting properties can be treated, ie infiltrated, with a combination of at least one ionic liquid and a material which has ion-conducting properties.
- Proton- or cation-conducting ceramic membranes according to the invention, which have at least one ionic liquid can be obtained by means of both embodiments of the method according to the invention.
- a composite material which has ion-conducting properties is used as the starting material.
- the production of such ion-conducting composite materials is described in WO 99/62620, among others.
- Such ion-conducting composite materials can be obtained by using at least one polymer-bound Bronsted acid or base in the production of the composite material.
- the ion-conducting composite material can preferably be obtained by using at least one solution or melt which comprises polymer particles or polyelectrolyte solutions which carry fixed charges. It can be advantageous if the polymers carrying the fixed charges or the polyelectrolytes have a melting or softening point below 500 ° C.
- Polymers or polyelectrolytes carrying fixed charges are preferably sulfonated polytetrafluoroethylene, sulfonated polyvinylidene fluoride, ammolyzed polytetrafluoroethylene, ammolyzed
- Polyvinylidene fluoride, sulfonated polysulfone, ammolysed polysulfone, sulfonated polyetherimide, ammolysed polyetherimide, sulfonated polyether or polyetheretherketone, ammolyzed polyether or polyetheretherketone or a mixture of these are used.
- the proportion of polymers carrying fixed charges or of the polyelectrolytes in the solution or melt used is preferably from 0.001% by weight to 50.0% by weight, particularly preferably from 0.01% and 25%.
- the ion-conducting composite material can also be obtained by using a sol which has at least one ion-conducting material or at least one material which has ion-conducting properties after a further treatment in the production of the composite material. Materials are preferably added to the sol, which lead to the formation of inorganic ion-conducting layers on the inner and / or outer surfaces of the particles contained in the composite material.
- the sol can be obtained by hydrolyzing at least one metal compound, at least one semimetal compound, at least one mixed metal compound or a phosphorus compound or a combination of these compounds with a liquid, a gas and / or a solid.
- Water, steam, ice, alcohol, base or acid or a combination of these compounds is preferably used as the liquid, gas and / or solid for the hydrolysis. It may be advantageous to add the compound to be hydrolyzed to alcohol and / or an acid or base before the hydrolysis.
- At least one nitrate, chloride, carbonate, acetylacetonate, acetate or an alcoholate of a metal, semimetal or a phosphoric acid ester is preferably hydrolyzed.
- the nitrate, chloride, acetylacetonate, acetate or alcoholate to be hydrolyzed is very particularly preferably a compound of the elements Ti, Zr, V, Mn, W, Mo, Cr, Al, Si, Sn and / or Y.
- a compound to be hydrolyzed carries non-hydrolyzable groups in addition to hydrolyzable groups.
- An organyltrialkoxy or diorganyldialkoxy or triorganyl alkoxy compound of the element silicon is preferably used as such a compound to be hydrolyzed.
- zeolites, ß-aluminum oxides, ß-alumosilicates, nanoscale ZrO 2 -, TiO 2 -, Al 2 O 3 - or SiO 2 -particles, zirconium or titanium phosphates are added to the sol as particles, an almost uniform result is obtained Composite that shows almost uniform ion conduction properties.
- at least one acid or base that is soluble in water and / or alcohol can be added to the sol.
- An acid or base of the elements Na, Mg, K, Ca, V, Y, Ti, Cr, W, Mo, Zr, Mn, Al, Si, P or S is preferably added.
- iso- and heteropolyacids can also be dissolved in the sol.
- the sol which is used for the production of the membrane or the ion-conducting composite material according to the invention can also comprise non-stoichiometric metal, semimetal or non-metal oxides or hydroxides which have been produced by changing the oxidation state of the corresponding element.
- the oxidation level can be changed by reaction with organic compounds or inorganic compounds or by electrochemical reactions.
- the oxidation stage is preferably changed by reaction with an alcohol, aldehyde, sugar, ether, olefin, peroxide or metal salt.
- Compounds that can change the oxidation state in this way e.g. Cr, Mn, V, Ti, Sn, Fe, Mo, W or Pb.
- the ion-conducting compound on the inner and outer surfaces are then various partially hydrolyzed or non-hydrolyzed oxides, phosphates, phosphides, phosphonates, stannates, plumbates, chromates, sulfates, sulfonates, vanadates, tungstates, molybdates, manganates, titanates, silicates or mixtures of these Elements AI, K, Na, Ti, Fe, Zr, Y, Va, W, Mo, Ca, Mg, Li, Cr, Mn, Co, Ni, Cu or Zn or mixtures of these elements.
- already permeable, ion-conducting or non-ion-conducting composite materials with ion-conducting materials can be used or treated with materials that have ion-conducting properties after further treatment.
- Such composite materials can be commercially available permeable materials or composite materials or else composite materials such as are described, for example, in PCT / EP98 / 05939. However, it is also possible to use composite materials which have been obtained by the process described above.
- Ion-conducting, permeable composite materials can be obtained by treating a composite material which has a pore size of 0.001 to 5 ⁇ m and no ion-conducting or ion-conducting properties with at least one ion-conducting material or with at least one material which has ion-conducting properties after a further treatment.
- the treatment of the composite material with at least one ion-conducting material or at least one material which has ion-conducting properties after a further treatment can be carried out by impregnation, dipping, brushing, rolling, rigging, spraying or other coating techniques.
- the composite material is preferably treated thermally.
- the thermal treatment is particularly preferably carried out at a temperature of 100 to 700.degree.
- the ion-conducting material or the material which has ion-conducting properties after a further treatment is preferably applied to the composite material in the form of a solution with a solvent content of 1-99.8%.
- polyorganylsiloxanes which have at least one ionic component can be used as the material for producing the ion-conducting composite material.
- the polyorganylsiloxanes can include, among others, polyalkyl and / or polyarylsiloxanes and / or other constituents.
- the material for producing the ion-conducting Composite material is used at least one Bronsted acid or base. It can also be advantageous if at least one trialkoxysilane solution or suspension containing acidic and / or basic groups is used as the material for producing the ion-conducting composite material.
- at least one of the acidic or basic groups is a quaternary ammonium, phosphonium, alkyl or arylsulfonic acid, carboxylic acid or phosphonic acid group.
- an existing permeable composite material by treating it with a silane or siloxane.
- a 1 - 20% solution of this silane is made up in a solution containing water and the composite material is immersed therein.
- Aromatic and aliphatic alcohols, aromatic and aliphatic hydrocarbons and other common solvents or mixtures can be used as solvents.
- the use of ethanol, octanol, toluene, hexane, cyclohexane and octane is advantageous.
- the impregnated composite material is dried at approx. 150 ° C. and can be used either directly or after subsequent coating and drying at 150 ° C. as an ion-conductive, permeable composite material. Both cationic and anionic silane or siloxane groups are suitable for this.
- the solution or suspension for treating the composite material also comprises acidic or basic compounds and water in addition to a trialkoxysilane.
- the acidic or basic compounds preferably comprise at least one Bronsted or Lewis acid or base known to the person skilled in the art.
- the sol contains silylsulfonic or silylphosphonic acids, particularly preferably hydroxysilylsulfonic acids and very particularly preferably trihydroxysilylpropylsulfonic acid or salts thereof.
- the composite material can also be treated with solutions, suspensions or sols which have at least one ion-conducting material.
- Treatment can be done once or repeated several times.
- Embodiment of the method according to the invention gives layers of one or several identical or different partially hydrolyzed or non-hydrolyzed oxides, phosphates, phosphides, phosphonates, sulfates, sulfonates, vanadates, tungstates, molybdate, manganates, titanates, silicates or mixtures of these of the elements AI, Si, P, K, Na, Ti, Fe , Zr, Y, Va, W, Mo, Ca, Mg, Li, Cr, Mn, Co, Ni, Cu or Zn or mixtures of these elements.
- the sols or suspensions can also contain one or more compounds from the group of nanoscale Al O 3 , ZrO 2 , TiO 2 and SiO 2 powders, zeolites, iso- or heteropolyacids and zirconium or titanium sulfoaryl phosphonates.
- the sol which may have the ion-conducting material, contains further hydrolyzed metal, semimetal or mixed metal compounds. These compounds have already been described in more detail in the case of the brines for producing the composite material.
- Ion-conducting composite materials or membranes produced in this way can be flexible.
- such ion-conducting composite materials or membranes can be designed to be bendable to a minimum radius of 25 mm.
- ion-conducting composites produced in this way come into use in the membranes according to the invention, but also ion-conducting composites produced by other methods.
- non-ion-conducting composite materials which can be used according to the invention preferably have a porosity of 5-50%, while the ion-conducting composite materials have a porosity of 0.5-10%.
- such an ion-conducting composite material is infiltrated with an ionic liquid or a solution containing an ionic liquid.
- All salts which are liquid at room temperature or at the temperature at which the membrane is to be used are suitable as ionic liquids.
- Those salts which have a melting temperature of below 100 ° C., preferably below 50 ° C., very particularly preferably below 20 ° C. and very particularly preferably below 0 ° C. are preferably used as ionic liquids.
- the liquid ionic liquid is diluted with a solvent (alcohols, ketones, esters, water) or the solid ionic liquid is dissolved in the solvent, the membrane is infiltrated with this solution and the membrane is dried, ie freed from the solvent.
- the infiltration of the ionic liquid into the composite material can take place at room temperature or at elevated temperature.
- the infiltration is preferably carried out at a temperature at which the ionic liquid is present as a liquid.
- the infiltration can be carried out by spraying, rigging, rolling, brushing the ionic liquid or its solution in a conventional organic solvent such as methanol onto the composite or by immersing (preferably under vacuum) the ion-conductive composite in an ionic liquid.
- a conventional organic solvent such as methanol
- immersing preferably under vacuum
- the capillary forces infiltrate the ionic liquids into the composite. If necessary, it may be necessary to spin off, dab off or blow off excess liquid after coating and possibly use additional solvents, e.g. by drying.
- a composite material which has no ion-conducting properties is used as the starting material.
- the production of such composite materials is described in WO 99/15262, among others.
- At least one suspension is brought into and onto at least one perforated and permeable carrier, the at least one inorganic component composed of at least one compound of at least one
- Metal a semi-metal or a mixed metal with at least one of the elements of FIG. 3. to 7th main group, and the suspension is solidified on and in the carrier material by at least one heating.
- the suspension can be placed on and in the carrier by printing, pressing, pressing, rolling, knife coating, spreading, dipping, spraying or pouring.
- the openwork and permeable support on and into which at least one suspension is brought can have at least one material selected from glasses, ceramics, minerals, plastics, amorphous substances, natural products, composites, composite materials or from at least a combination of these materials.
- the permeable carrier it is also possible to use those which have been made permeable by treatment with laser beams or ion beams. Woven or non-woven fabrics made of fibers of the above-mentioned materials, e.g. Glass cloth or mineral fiber cloth used.
- the suspension used which can have at least one inorganic component and at least one metal oxide sol, at least one semimetal oxide sol or at least one mixed metal oxide sol or a mixture of these sols, can be produced by suspending at least one inorganic component in at least one of these sols.
- the sols are obtained by hydrolyzing at least one compound, preferably at least one metal compound, at least one semi-metal compound or at least one mixed metal compound with at least one liquid, solid or gas, it being advantageous if, for example, water, alcohol or an acid is used as the liquid, ice as a solid or water vapor as a gas or at least a combination of these liquids, solids or gases. It may also be advantageous to add the compound to be hydrolyzed to alcohol or an acid or a combination of these liquids before the hydrolysis.
- At least one metal nitrate, a metal chloride, a metal carbonate, a metal alcoholate compound or at least one semimetal alcoholate compound is selected from among the Compounds of the elements Ti, Zr, Al, Si, Sn, Ce or Y, such as titanium alcoholates, such as titanium isopropylate, silicon alcoholates, zirconium alcoholates, or a metal nitrate, such as zirconium nitrate, are hydrolyzed.
- the hydrolyzed compound can be treated with at least one organic or inorganic acid, preferably with a 10 to 60% organic or inorganic acid, particularly preferably with a mineral acid selected from sulfuric acid, hydrochloric acid, perchloric acid, phosphoric acid and nitric acid or a mixture of these acids become.
- brine that has been produced as described above, but also commercially available brine such as Titanium nitrate sol, zirconium nitrate sol or silica sol.
- brines can also be produced and used as they correspond to the prior art.
- At least one inorganic component which has a particle size of 0.5 nm to 10 ⁇ m, is suspended in at least one of the brines mentioned.
- An inorganic component which has at least one compound selected from metal compounds, semimetal compounds, mixed metal compounds and mixed metal compounds with at least one of the elements of the 3rd to 7th main group, or at least a mixture of these compounds, is preferably suspended.
- At least one inorganic component which comprises at least one compound from the oxides of the subgroup elements or from the elements of the 3rd to 5th main group, preferably oxides selected from the oxides of the elements Sc, Y, Ti, Zr, Nb, Ce, V, Cr, Mo, W, Mn, Fe, Co, B, AI, In, TI, Si, Ge, Sn, Pb and Bi, such as Y 2 O 3 , Zr0 2 , Fe 2 O 3 , Fe 3 O 4 , SiO, Al 2 O 3 has suspended.
- the inorganic component can also be aluminosilicates, aluminum phosphates, zeolites or partially exchanged zeolites, such as ZSM-5, Na-ZSM-5 or Fe-ZSM-5 or amorphous microporous mixed oxides, which do not contain up to 20% can contain hydrolyzable organic compounds, such as, for example, vanadium oxide-silicon oxide glass or aluminum oxide-silicon oxide-methyl silicon sesquioxide glasses.
- the mass fraction of the suspended component is preferably 0.1 to 500 times the hydrolyzed compound used.
- the freedom from cracks in the composite material according to the invention can be optimized .
- 100 ⁇ m can preferably be used in suspensions which have a suspended compound with a grain size of at least 0.7 ⁇ m.
- the composite material according to the invention can preferably have a thickness of 5 to 1000 ⁇ m, particularly preferably 20 to 100 ⁇ m.
- the suspension of sol and compounds to be suspended preferably has a ratio of sol to compounds to be suspended from 0.1: 100 to 100: 0.1, preferably from 0.1: 10 to 10: 0.1 parts by weight.
- the suspension present on or in or on and in the carrier can be solidified by heating this composite to 50 to 1000 ° C.
- this composite is held for 10 min. exposed to a temperature of 50 to 100 ° C for up to 5 hours.
- this assembly is exposed to a temperature of 100 to 800 ° C. for 1 second to 10 minutes.
- the composite can be heated according to the invention by means of heated air, hot air, infrared radiation, microwave radiation or electrically generated heat.
- a non-ion-conducting composite material can then be infiltrated with a solution or suspension which has at least one cation / proton-conducting material and at least one ionic liquid.
- Polyorganylsiloxanes that have at least one ionic component can be used.
- the polyorganylsiloxanes can include, among others, polyalkyl and / or polyarylsiloxanes and / or other constituents.
- the cation- / proton-conducting materials can also be advantageous if Brönstedt or Lewis acids or bases are used as the cation- / proton-conducting materials. It can also be advantageous if at least one trialkoxysilane solution or suspension containing acidic and / or basic groups is used as the material for producing the membranes according to the invention. Preferably at least one of the acidic or basic groups is a quaternary ammonium, phosphonium, silylsulfone or silylphosphonic, carboxylic or phosphonic acid group.
- cation-z proton-conducting materials can be used which easily give off protons or cations, such as, for example, carboxylic acids with low vapor pressure, mineral acids, sulfonic acids, phosphonic acids, nanoscale powders, such as, for example, Al 2 O 3 , TiO 2 , SiO 2 , ZrO, zirconium or titanium phosphates , -phosphonates, and -sulfoarylphosphonates, iso- and heteropolyacids, zeolites, ß-aluminum oxides. In the case of acid, the corresponding salts can also be used.
- Polymer particles or polyelectrolytes carrying fixed charges can also be present as cation- / proton-conducting materials in the solution or suspension. It can be advantageous if the polymers or polyelectrolytes carrying fixed charges have a melting or softening point below 500 ° C.
- sulfonated as fixed charges bearing polymers or polyelectrolytes polytetrafluoroethylene, sulfonated polyvinylidene fluoride, polytetrafluoroethylene ammolysêts, ammolysêts polyvinylidene fluoride, sulfonated polysulfone, ammolysêts polysulfone, sulfonated polyetherimide, polyetherimide ammolysêts, sulfonated polyether or polyether ether ketone, polyether ammolystechnischs or polyetheretherketone, or a mixture of these is used.
- the proportion of polymers carrying fixed charges or of the polyelectrolytes in the solution or suspension used is preferably from 0.001% by weight to 50.0% by weight, particularly preferably from 0.01% and 25%.
- the suspensions or solutions used preferably have a proportion of ionic liquid of 5 to 90% by volume, preferably 10 to 30% by volume and a proportion of ⁇ roton / cation-conducting material of 10 to 95% by volume, preferably of 70 to 90% by volume.
- the suspensions or solutions can be used to infiltrate the non-ion-conducting composite materials as described above.
- the cationic or proton-conducting ceramic membranes according to the invention can be used particularly advantageously in fuel cells.
- the only conditions for use as an electrolyte membrane in a fuel cell are that the membrane according to the invention must have an ionic liquid which is stable in the presence of the ion-conducting materials, which is stable and liquid at the operating temperature of the fuel cell and which is resistant to hydrolysis, since in the Fuel cell is created during the operation of water.
- Another aspect of the present invention is therefore also a fuel cell that has at least one cation or proton-conducting ceramic membrane that has an ionic liquid.
- a membrane according to the invention in a fuel cell, and particularly preferably in a reformate or direct methanol fuel cell, is particularly advantageous against the background of better thermal stability in the Comparison to polymer membranes.
- the working range of fuel cells based on proton-conductive membranes is limited to a temperature of typically 80 - 90, maximum 120 - 130 ° C by using Nation ® as a membrane. Higher temperatures lead to a sharp decrease in the ion conductivity of the Nafion.
- the membrane according to the invention ensures that the high conductivity and thus also the high power density is maintained even at temperatures of a maximum of 300 ° C., preferably a maximum of 200 ° C., even in a water-free atmosphere.
- the membrane according to the invention is therefore particularly suitable as an electrolyte membrane in a direct methanol fuel cell.
- the membrane according to the invention is also suitable for use in electrodialysis, electrolysis or in catalysis.
- Example 1 Non-ion conductive composite
- This suspension is then applied in a thin layer to a glass fabric (11-Tex yarn with 28 warp and 32 weft threads) and solidified at 550 ° C within 5 seconds.
- Example 2 Production of a proton-conducting membrane 10 ml of anhydrous trihydroxysilylpropylsulfonic acid, 30 ml of ethanol and 5 ml of water are mixed by stirring. 40 ml of TEOS (tetraethyl orthosilicate) are slowly added dropwise to this mixture with stirring. In order to achieve a certain condensation, this sol is stirred in a closed vessel for 24 h. The composite material from Example 1 is immersed in this sol for 15 minutes. The sol is then allowed to gel in the impregnated membrane for 60 minutes in air and dry.
- TEOS tetraethyl orthosilicate
- the membrane filled with the gel is dried at a temperature of 200 ° C. for 60 minutes, so that the gel has solidified and has been rendered water-insoluble. In this way a dense membrane is obtained which has a proton conductivity at room temperature and normal ambient air of approx. 2-10 "3 S / cm.
- Example 2 25 g of tungsten phosphoric acid are additionally dissolved in 50 ml of the sol from Example 2.
- the composite material from Example 1 is immersed in this sol for 15 minutes. Then proceed as in Example 2.
- Example 1 Sodium trihydroxysilylmethylphosphonate dissolved in a little water is diluted with ethanol. The same amount of TEOS is added to this solution and stirring is continued briefly. The composite material from Example 1 is immersed in this sol for 15 minutes. The membrane is then dried, solidified at 250 ° C. and the proton-conductive membrane is thus obtained.
- Example 8 Infiltration of a proton-conducting membrane with the ionic liquid
- An ion-conducting composite material according to Examples 2-7 can be sprayed with [EMIM] CF 3 SO 3 as an ionic liquid. Spraying can be carried out from one side of the composite material until the opposite side of the composite material is also wetted by the ionic liquid which has passed through the composite material. In this way it can be achieved that the air contained in the porous ion-conducting composite material has been displaced by the ionically conductive liquid.
- This membrane can be allowed to air dry after wiping off excess ionic liquid.
- the ionic liquid is retained in the membrane according to the invention by capillary forces. Since ionic liquids have no measurable vapor pressure, a reduction in the ionic liquid in the membrane cannot be expected even after the membrane produced according to the invention has been stored for a long time.
- Example 9 Infiltration of a proton-conducting membrane with the ionic liquid
- an ionic liquid selected from the table given in the text is used.
- the ion-conducting composite material from one of the Examples 2-7 are immersed in the ionic liquid for 30 minutes. After the excess ionic liquid has drained off, the membrane can be installed in a fuel cell.
- Example 10 Production of an ion-conducting membrane
- the non-ion-conducting composite material from Example 1 is immersed in [EMIM] CF 3 SO 3 for 30 min, which contains a total of 50% by weight of trihdroxysilylpropylsulfonic acid, tetraethyl orthosilicate and a small amount of water. After the silicon-containing compounds have gelled, the proton-conducting membrane is obtained after a heat treatment of up to 180 ° C.
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Abstract
Description
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Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE10061959A DE10061959A1 (de) | 2000-12-13 | 2000-12-13 | Kationen-/protonenleitende, mit einer ionischen Flüssigkeit infiltrierte keramische Membran, Verfahren zu deren Herstellung und die Verwendung der Membran |
DE10061959 | 2000-12-13 | ||
PCT/EP2001/012499 WO2002047802A1 (de) | 2000-12-13 | 2001-10-29 | Kationen-/protonenleitende, mit einer ionischen flüssigkeit infiltrierte keramische membran, verfahren zu deren herstellung und die verwendung der membran |
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2001
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- 2001-10-29 JP JP2002549367A patent/JP2004515351A/ja active Pending
- 2001-10-29 PL PL36184801A patent/PL361848A1/xx unknown
- 2001-10-29 WO PCT/EP2001/012499 patent/WO2002047802A1/de not_active Application Discontinuation
- 2001-10-29 CA CA002431057A patent/CA2431057A1/en not_active Abandoned
- 2001-10-29 US US10/433,488 patent/US20040038105A1/en not_active Abandoned
- 2001-10-29 AU AU2002221783A patent/AU2002221783A1/en not_active Abandoned
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JP2004515351A (ja) | 2004-05-27 |
US20040038105A1 (en) | 2004-02-26 |
DE10061959A1 (de) | 2002-06-20 |
NO20032718D0 (no) | 2003-06-13 |
CA2431057A1 (en) | 2002-06-20 |
WO2002047802A1 (de) | 2002-06-20 |
AU2002221783A1 (en) | 2002-06-24 |
NO20032718L (no) | 2003-06-13 |
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