KR101540673B1 - 이차전지용 양극 활물질 및 이를 포함하는 리튬 이차전지 - Google Patents
이차전지용 양극 활물질 및 이를 포함하는 리튬 이차전지 Download PDFInfo
- Publication number
- KR101540673B1 KR101540673B1 KR1020120085167A KR20120085167A KR101540673B1 KR 101540673 B1 KR101540673 B1 KR 101540673B1 KR 1020120085167 A KR1020120085167 A KR 1020120085167A KR 20120085167 A KR20120085167 A KR 20120085167A KR 101540673 B1 KR101540673 B1 KR 101540673B1
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- South Korea
- Prior art keywords
- active material
- lithium
- oxide
- material according
- cathode active
- Prior art date
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- 239000006182 cathode active material Substances 0.000 title claims abstract description 52
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 34
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 claims abstract description 25
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 claims abstract description 25
- RSNHXDVSISOZOB-UHFFFAOYSA-N lithium nickel Chemical compound [Li].[Ni] RSNHXDVSISOZOB-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000002902 bimodal effect Effects 0.000 claims abstract description 18
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 229910000428 cobalt oxide Inorganic materials 0.000 claims abstract description 6
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 23
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 claims description 22
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 19
- 229910052731 fluorine Inorganic materials 0.000 claims description 19
- 239000011737 fluorine Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 17
- 239000007774 positive electrode material Substances 0.000 claims description 17
- 229920000642 polymer Polymers 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 14
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 239000011247 coating layer Substances 0.000 claims description 9
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- -1 polyphenylene Polymers 0.000 description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 239000010936 titanium Substances 0.000 description 13
- 229910052759 nickel Inorganic materials 0.000 description 10
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 9
- 238000003860 storage Methods 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 8
- 229910017052 cobalt Inorganic materials 0.000 description 8
- 239000010941 cobalt Substances 0.000 description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 8
- 239000004020 conductor Substances 0.000 description 8
- 239000011572 manganese Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- 239000011255 nonaqueous electrolyte Substances 0.000 description 6
- 239000007784 solid electrolyte Substances 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910003002 lithium salt Inorganic materials 0.000 description 5
- 159000000002 lithium salts Chemical class 0.000 description 5
- 229910021437 lithium-transition metal oxide Inorganic materials 0.000 description 5
- VGYDTVNNDKLMHX-UHFFFAOYSA-N lithium;manganese;nickel;oxocobalt Chemical compound [Li].[Mn].[Ni].[Co]=O VGYDTVNNDKLMHX-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910044991 metal oxide Inorganic materials 0.000 description 5
- 150000004706 metal oxides Chemical class 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 239000010406 cathode material Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 3
- 229910013716 LiNi Inorganic materials 0.000 description 3
- 229910013870 LiPF 6 Inorganic materials 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000011149 active material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- 229910013063 LiBF 4 Inorganic materials 0.000 description 2
- 229910013684 LiClO 4 Inorganic materials 0.000 description 2
- 229910012488 LiNi0.55Mn0.30Co0.15O2 Inorganic materials 0.000 description 2
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000006183 anode active material Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 229910003480 inorganic solid Inorganic materials 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 239000011356 non-aqueous organic solvent Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000005518 polymer electrolyte Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- PYOKUURKVVELLB-UHFFFAOYSA-N trimethyl orthoformate Chemical compound COC(OC)OC PYOKUURKVVELLB-UHFFFAOYSA-N 0.000 description 2
- MIZLGWKEZAPEFJ-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical compound FC=C(F)F MIZLGWKEZAPEFJ-UHFFFAOYSA-N 0.000 description 1
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 description 1
- PPDFQRAASCRJAH-UHFFFAOYSA-N 2-methylthiolane 1,1-dioxide Chemical compound CC1CCCS1(=O)=O PPDFQRAASCRJAH-UHFFFAOYSA-N 0.000 description 1
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 1
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229910000925 Cd alloy Inorganic materials 0.000 description 1
- 229920013683 Celanese Polymers 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 229910005793 GeO 2 Inorganic materials 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910007969 Li-Co-Ni Inorganic materials 0.000 description 1
- 229910012722 Li3N-LiI-LiOH Inorganic materials 0.000 description 1
- 229910012716 Li3N-LiI—LiOH Inorganic materials 0.000 description 1
- 229910012734 Li3N—LiI—LiOH Inorganic materials 0.000 description 1
- 229910013043 Li3PO4-Li2S-SiS2 Inorganic materials 0.000 description 1
- 229910013035 Li3PO4-Li2S—SiS2 Inorganic materials 0.000 description 1
- 229910012810 Li3PO4—Li2S-SiS2 Inorganic materials 0.000 description 1
- 229910012797 Li3PO4—Li2S—SiS2 Inorganic materials 0.000 description 1
- 229910012047 Li4SiO4-LiI-LiOH Inorganic materials 0.000 description 1
- 229910012075 Li4SiO4-LiI—LiOH Inorganic materials 0.000 description 1
- 229910012057 Li4SiO4—LiI—LiOH Inorganic materials 0.000 description 1
- 229910010238 LiAlCl 4 Inorganic materials 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910015044 LiB Inorganic materials 0.000 description 1
- 229910013528 LiN(SO2 CF3)2 Inorganic materials 0.000 description 1
- 229910012513 LiSbF 6 Inorganic materials 0.000 description 1
- 229910012573 LiSiO Inorganic materials 0.000 description 1
- 229910012346 LiSiO4-LiI-LiOH Inorganic materials 0.000 description 1
- 229910012345 LiSiO4-LiI—LiOH Inorganic materials 0.000 description 1
- 229910012348 LiSiO4—LiI—LiOH Inorganic materials 0.000 description 1
- 229910006555 Li—Co—Ni Inorganic materials 0.000 description 1
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 description 1
- 239000004472 Lysine Substances 0.000 description 1
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical class C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- BEKPOUATRPPTLV-UHFFFAOYSA-N [Li].BCl Chemical compound [Li].BCl BEKPOUATRPPTLV-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
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- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
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- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- AXDCOWAMLFDLEP-UHFFFAOYSA-N dimethoxyphosphoryl dimethyl phosphate Chemical compound COP(=O)(OC)OP(=O)(OC)OC AXDCOWAMLFDLEP-UHFFFAOYSA-N 0.000 description 1
- 150000004862 dioxolanes Chemical class 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
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- 150000002170 ethers Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- BLBBMBKUUHYSMI-UHFFFAOYSA-N furan-2,3,4,5-tetrol Chemical compound OC=1OC(O)=C(O)C=1O BLBBMBKUUHYSMI-UHFFFAOYSA-N 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N germanium monoxide Inorganic materials [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 235000012907 honey Nutrition 0.000 description 1
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- 150000003949 imides Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Inorganic materials [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
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- 150000002815 nickel Chemical class 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 2는 본 발명의 하나의 실시예에 따른 양극 활물질의 SEM 사진이다;
도 3는 실험예 1 및 비교예 1에 따른 양극 활물질의 압력에 따른 밀도변화에 대한 비교 그래프이다;
도 4 실험예 2 및 비교예 2에 따른 온도 변화와 리튬 이차전지의 고온 저장 특성 비교 그래프이다.
Claims (22)
- 2.50V 내지 4.35V의 작동 전압 영역을 갖는 이차전지용 양극 활물질로서, 리튬 코발트계 산화물 및 표면 처리된 리튬 니켈계 산화물을 포함하고, 상기 양극 활물질은 상기 코발트계 산화물의 평균 입경과 리튬 니켈계 복합 산화물의 평균 입경이 서로 다른 바이모달(bimodal) 형태에 의해 바이모달 형태가 아닌 평균 입경이 유사한 리튬 코발트 산화물과 리튬 니켈계 산화물로 구성된 양극 활물질의 압연 밀도 보다 높은 압연 밀도를 가지고,
상기 리튬 니켈계 산화물은 불소 함유 폴리머와 반응하여 리튬 니켈계 산화물 표면 전체에 불소로 코팅된 코팅층이 형성되어 있는 것을 특징으로 하는 양극 활물질. - 삭제
- 제 1 항에 있어서, 상기 양극 활물질의 압연 밀도는 3.8 내지 4.0 g/cc 인 것을 특징으로 하는 양극 활물질.
- 제 1 항에 있어서, 상기 리튬 코발트계 산화물의 평균 입경은 16 ~ 25 ㎛이고, 상기 리튬 니켈계 산화물의 평균 입경은 2 ~ 10 ㎛인 것을 특징으로 하는 양극 활물질.
- 제 1 항에 있어서, 상기 리튬 코발트계 산화물의 평균 입경은 2 ~ 10 ㎛이고, 상기 리튬 니켈계 산화물의 평균 입경은 16 ~ 25 ㎛인 것을 특징으로 하는 양극 활물질.
- 제 1 항에 있어서, 상기 리튬 코발트계 산화물은 하기 화학식 1로 표현되는 것을 특징으로 하는 양극 활물질:
Li(Co(1-a)Ma)O2 (1)
상기 식에서,
0.1≤a≤0.2이고,
상기 M은 Mg, Ti, Zr, Al 및 Si로 이루어진 군에서 선택되는 적어도 하나의 이상의 원소이다. - 제 6 항에 있어서, 상기 M은 Mg, 또는 Ti, 또는 Mg 및 Ti인 것을 특징으로 하는 양극 활물질.
- 제 1 항에 있어서, 상기 리튬 코발트계 산화물은 표면 전체에 Al2O3이 코팅되어 있고, Al의 함유량은 리튬 코발트계 산화물 전체 중량에 대해 0.001 내지 2000 ppm인 것을 특징으로 하는 양극 활물질.
- 제 8 항에 있어서, 상기 Al의 함유량은 350 내지 500 ppm인 것을 특징으로 하는 양극 활물질.
- 제 8 항에 있어서, 상기 Al2O3의 코팅 두께는 0.5 ~ 2 ㎚인 것을 특징으로 하는 양극 활물질.
- 제 8 항에 있어서, 상기 Al2O3은 습식법에 의해 리튬 코발트계 산화물의 표면에 코팅된 것을 특징으로 하는 양극 활물질.
- 제 1 항에 있어서, 상기 리튬 니켈계 산화물은 하기 화학식 2로 표현되고 양극 활물질의 전체 중량 대비 10 내지 50 중량%로 포함되어 있는 것을 특징으로 하는 양극 활물질:
Li1 + xNiaMnbCo1 -(a+b)O2 (2)
상기 식에서,
-0.2≤x≤0.2, 0.5≤a≤0.6, 0.2≤b≤0.3이다. - 제 12 항에 있어서, 상기 리튬 니켈계 산화물은 양극 활물질의 전체 중량 대비 20 내지 40 중량%로 포함되어 있는 것을 특징으로 하는 양극 활물질.
- 제 1 항에 있어서, 상기 코팅층의 불소 함유량은 리튬 니켈계 산화물 전체 중량에 대해 0.001 내지 3000 ppm인 것을 특징으로 하는 양극 활물질.
- 제 1 항에 있어서, 상기 불소 함유 폴리머는 PVdF 또는 PVdF-HFP인 것을 특징으로 하는 양극 활물질.
- 제 15 항에 있어서, 상기 불소 함유 폴리머는 PVdF인 것을 특징으로 하는 양극 활물질.
- 삭제
- 삭제
- 제 14 항에 있어서, 상기 불소의 함유량은 리튬 니켈계 산화물 전체 중량에 대해 1000 내지 2000 ppm인 것을 특징으로 하는 양극 활물질.
- 제 14 항에 있어서, 상기 코팅은 0.5 ~ 2 ㎚ 범위의 두께로 코팅된 것을 특징으로 하는 양극 활물질.
- 제 14 항에 있어서, 상기 코팅은 습식법 또는 건식법에 의해 이루어진 것을 특징으로 하는 양극 활물질.
- 제 1 항에 따른 상기 양극 활물질을 포함하는 것으로 구성되고, 작동 전압 영역이 2.50V ~ 4.35V인 것을 특징으로 하는 리튬 이차전지.
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PCT/KR2013/006872 WO2014021626A1 (ko) | 2012-08-03 | 2013-07-31 | 이차전지용 양극 활물질 및 이를 포함하는 리튬 이차전지 |
US14/409,532 US9825283B2 (en) | 2012-08-03 | 2013-07-31 | Cathode active material for secondary battery and lithium secondary battery comprising the same |
CN201380037640.3A CN104471759B (zh) | 2012-08-03 | 2013-07-31 | 二次电池用正极活性材料和包含其的锂二次电池 |
EP13825083.2A EP2882014A4 (en) | 2012-08-03 | 2013-07-31 | ANODEACTIVE MATERIAL FOR A SECONDARY BATTERY AND LITHIUM SUBSTITUTING BATTERY THEREWITH |
JP2015520078A JP6099741B2 (ja) | 2012-08-03 | 2013-07-31 | 二次電池用正極活物質及びそれを含むリチウム二次電池 |
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KR20180027143A (ko) * | 2016-09-06 | 2018-03-14 | 주식회사 엘지화학 | 고밀도의 양극재를 통해 고용량을 구현한 이차전지용 양극 및 이를 제조하는 방법 |
WO2020180125A1 (ko) * | 2019-03-07 | 2020-09-10 | 주식회사 엘지화학 | 리튬 이차전지 |
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US9825283B2 (en) | 2017-11-21 |
CN104471759A (zh) | 2015-03-25 |
EP2882014A1 (en) | 2015-06-10 |
WO2014021626A1 (ko) | 2014-02-06 |
JP2015528181A (ja) | 2015-09-24 |
JP6099741B2 (ja) | 2017-03-22 |
KR20140018685A (ko) | 2014-02-13 |
EP2882014A4 (en) | 2016-04-06 |
CN104471759B (zh) | 2018-01-12 |
US20150162598A1 (en) | 2015-06-11 |
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