CN116288943A - Preparation method of double-function film capable of optimizing cathode of metal-air battery - Google Patents
Preparation method of double-function film capable of optimizing cathode of metal-air battery Download PDFInfo
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- CN116288943A CN116288943A CN202310257837.3A CN202310257837A CN116288943A CN 116288943 A CN116288943 A CN 116288943A CN 202310257837 A CN202310257837 A CN 202310257837A CN 116288943 A CN116288943 A CN 116288943A
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- carbon dioxide
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 21
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 21
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 16
- 239000001301 oxygen Substances 0.000 claims abstract description 16
- 239000003463 adsorbent Substances 0.000 claims abstract description 14
- 230000001588 bifunctional effect Effects 0.000 claims abstract description 11
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 7
- 239000006185 dispersion Substances 0.000 claims abstract description 5
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910001887 tin oxide Inorganic materials 0.000 claims abstract description 5
- 239000011787 zinc oxide Substances 0.000 claims abstract description 4
- 239000002033 PVDF binder Substances 0.000 claims description 14
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 14
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 12
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 12
- 239000004793 Polystyrene Substances 0.000 claims description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 12
- 239000003960 organic solvent Substances 0.000 claims description 12
- 229920002223 polystyrene Polymers 0.000 claims description 6
- 238000009987 spinning Methods 0.000 claims description 6
- WHRNULOCNSKMGB-UHFFFAOYSA-N tetrahydrofuran thf Chemical compound C1CCOC1.C1CCOC1 WHRNULOCNSKMGB-UHFFFAOYSA-N 0.000 claims description 6
- UXGNZZKBCMGWAZ-UHFFFAOYSA-N dimethylformamide dmf Chemical compound CN(C)C=O.CN(C)C=O UXGNZZKBCMGWAZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000001523 electrospinning Methods 0.000 claims description 3
- 239000010408 film Substances 0.000 claims 2
- 239000010409 thin film Substances 0.000 claims 2
- 238000001179 sorption measurement Methods 0.000 abstract description 10
- 230000005764 inhibitory process Effects 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/43—Acrylonitrile series
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- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4318—Fluorine series
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
- H01M4/8657—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites layered
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
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Abstract
The invention discloses a preparation method of a bifunctional film capable of optimizing a cathode of a metal-air battery, which comprises the following steps: 1) Preparing a first ink based on polyethylenimine PEI as carbon dioxide adsorbent; 2) Preparing a second ink based on tin oxide or zinc oxide nano-dispersion as an oxygen adsorbent; 3) Based on a coaxial electrostatic spinning process, taking the first ink as an inner layer or an outer layer printing ink, and taking the second ink as an outer layer or an inner layer printing ink; 4) Setting coaxial electrostatic spinning parameters, and carrying out coaxial electrostatic spinning; 5) And standing the fiber film prepared by coaxial electrostatic spinning on a roller for 0.5-3h for curing, and drying in a drying oven at 70-90 ℃ for 1-3h after curing. Compared with the traditional carbon dioxide inhibition film, the film has the double functions of carbon dioxide inhibition and oxygen-philic adsorption, can effectively inhibit cathode corrosion, increase oxygen intake amount and effectively improve electrochemical performance of the metal-air battery.
Description
Technical Field
The invention particularly relates to a preparation method of a bifunctional film capable of optimizing a cathode of a metal-air battery, and relates to the field of metal-air batteries.
Background
Metal-air batteries (e.g., zinc-air batteries, aluminum-air batteries, sodium-air batteries, etc.) have oxygen in the air as the active material. Along with the inhalation of oxygen, carbon dioxide in the air is inevitably introduced into the cell through the cathode. Carbon dioxide entering the cell is easy to react with electrolyte to generate carbonate, so that the conductivity of the electrolyte is reduced, byproducts are accumulated on the cathode, and the electrochemical performance of the cell is reduced. Therefore, suppression of carbon dioxide is extremely important for metal-air batteries.
Currently, there are two strategies for metal-air batteries to suppress carbon dioxide based on existing research. Firstly, adding carbon dioxide inhibition powder or particles into a cathode to prevent excessive carbon dioxide from entering the interior of a battery; secondly, an oxygen adsorption layer (such as active carbon and the like) is added on the surface of the cathode, so that the oxygen adsorption amount is increased, and the entry of carbon dioxide is reduced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a preparation method of a bifunctional film capable of optimizing a cathode of a metal-air battery, which can effectively improve the inhibition rate of carbon dioxide and the oxygen adsorption quantity of the air cathode, slow down the corrosion of the carbon dioxide of the cathode and improve the electrochemical performance of the battery.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method for preparing a bifunctional film capable of optimizing a cathode of a metal-air battery, comprising the following steps:
1) Preparing a first ink, wherein polyethyleneimine PEI is selected as a carbon dioxide adsorbent, any one of polyacrylonitrile PAN, polyvinylidene fluoride PVDF and polystyrene PS is selected as an auxiliary agent, and any one or more of N, N-Dimethylformamide (DMF), dimethylacetamide DMAc, acetone AC and tetrahydrofuran THF is selected as an organic solvent, wherein the mass ratio of the carbon dioxide adsorbent to the auxiliary agent to the organic solvent is (1.5-2): 1-2.5:5.5-7.5;
2) Preparing a second ink, namely selecting tin oxide or zinc oxide nano dispersion liquid as an oxygen adsorbent, selecting any one of polyacrylonitrile PAN, polyvinylidene fluoride PVDF and polystyrene PS as an auxiliary agent, and selecting one or more of N, N-dimethylformamide DMF, dimethylacetamide DMAc, acetone AC and tetrahydrofuran THF as an organic solvent, wherein the mass ratio of the oxygen adsorbent to the auxiliary agent to the organic solvent is (1.5-2): 1-2.5:5.5-7.5;
3) Based on a coaxial electrostatic spinning process, taking the first ink as an inner layer or an outer layer printing ink, and taking the second ink as an outer layer or an inner layer printing ink;
4) Setting coaxial electrostatic spinning parameters, and carrying out coaxial electrostatic spinning;
5) And standing the fiber film prepared by coaxial electrostatic spinning on a roller for 0.5-3h for curing, and drying in a drying oven at 70-90 ℃ for 1-3h after curing.
And 3) selecting a needle with the inner diameter of 1.2-2.5mm as an outer layer needle of the coaxial electrostatic spinning nozzle, and selecting a needle with the inner diameter of 0.5-2.0mm as an inner layer needle.
The parameters of coaxial electrospinning were as follows:
the needle head is adjusted to be 10 cm to 15cm away from the collecting roller; the rotating speed of the spinning machine roller is 300-800rpm;
the flow rate of the outer layer solution is 0.5-1.5ml/h, the flow rate of the inner layer solution is 0.2-0.8ml/h, and the spinning voltage is 8-18kV.
The invention has the beneficial effects that: compared with the traditional carbon dioxide inhibition film, the film has the double functions of carbon dioxide inhibition and oxygen-philic adsorption, can effectively inhibit cathode corrosion, increase oxygen intake amount and effectively improve electrochemical performance of the metal-air battery.
Drawings
FIG. 1 is a graph showing the adsorption amount of carbon dioxide.
FIG. 2 is a graph showing the adsorption amount of oxygen.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
As shown in the figure, the invention discloses a preparation method of a bifunctional film capable of optimizing a cathode of a metal-air battery, which comprises the following steps:
1) Preparing a first ink, wherein polyethyleneimine PEI is selected as a carbon dioxide adsorbent, any one of polyacrylonitrile PAN, polyvinylidene fluoride PVDF and polystyrene PS is selected as an auxiliary agent, and any one or more of N, N-Dimethylformamide (DMF), dimethylacetamide DMAc, acetone AC and tetrahydrofuran THF is selected as an organic solvent, wherein the mass ratio of the carbon dioxide adsorbent to the auxiliary agent to the organic solvent is (1.5-2): 1-2.5:5.5-7.5;
2) Preparing a second ink, namely selecting tin oxide or zinc oxide nano dispersion liquid as an oxygen adsorbent, selecting any one of polyacrylonitrile PAN, polyvinylidene fluoride PVDF and polystyrene PS as an auxiliary agent, and selecting one or more of N, N-dimethylformamide DMF, dimethylacetamide DMAc, acetone AC and tetrahydrofuran THF as an organic solvent, wherein the mass ratio of the oxygen adsorbent to the auxiliary agent to the organic solvent is (1.5-2): 1-2.5:5.5-7.5;
3) Based on a coaxial electrostatic spinning process, taking the first ink as an inner layer or an outer layer printing ink, and taking the second ink as an outer layer or an inner layer printing ink; the needle with the inner diameter of 1.2-2.5mm is selected as the outer layer needle of the coaxial electrostatic spinning nozzle, and the needle with the inner diameter of 0.5-2.0mm is selected as the inner layer needle.
4) Setting coaxial electrostatic spinning parameters, and carrying out coaxial electrostatic spinning; the parameters of coaxial electrospinning were as follows:
the needle head is adjusted to be 10 cm to 15cm away from the collecting roller; the rotating speed of the spinning machine roller is 300-800rpm;
the flow rate of the outer layer solution is 0.5-1.5ml/h, the flow rate of the inner layer solution is 0.2-0.8ml/h, and the spinning voltage is 8-18kV.
5) And standing the fiber film prepared by coaxial electrostatic spinning on a roller for 0.5-3h for curing, and drying in a drying oven at 70-90 ℃ for 1-3h after curing.
Examples
The preparation method comprises the following steps of preparing a uniform mixed solution of polyethylenimine PEI, polyvinylidene fluoride PVDF and N, N-dimethylformamide DMF according to a mass ratio of 1.5:2:6.5 as a first ink. And preparing a uniform mixed solution of tin oxide nano dispersion liquid, polyacrylonitrile PAN and N, N-dimethylformamide DMF according to the mass ratio of 1.5:2:6.5 as second ink. The first ink is used as an inner layer solution, and the second ink is used as an outer layer solution.
The flow rate of the inner ink was 0.7ml/h and the flow rate of the outer ink was 1.5ml/h by means of a syringe pump.
The electrostatic spinning voltage was 10kV, the needle distance from the collecting substrate size was 12cm, and the spin machine drum speed was 500rpm.
And after the electrostatic spinning is finished, standing the fiber film on a roller for 2 hours for curing, putting the cured fiber film into a drying oven at 80 ℃ for drying for 2 hours, and taking out the fiber film to obtain the double-function film capable of optimizing the cathode of the metal-air battery.
The combination of the bifunctional film, which can optimize the cathode of the metal-air battery, with the air cathode can be achieved by hot-pressing or cold-pressing. The prepared bifunctional film capable of optimizing the cathode of the metal-air battery is hot-pressed with a traditional carbon electrode brush coating, the pressure is 8Mpa, the temperature is 60 ℃, and the time is 50min, so that the cathode can be used as a high-performance air cathode modified by the bifunctional film. The test shows that the high-performance air cathode oxidation adsorption and oxygen adsorption performances are shown in fig. 1 and 2. Compared with the traditional air cathode, after the double-function film is optimized, the carbon dioxide inhibition rate and the oxygen adsorption quantity are obviously improved.
The examples should not be construed as limiting the invention, but any modifications based on the spirit of the invention should be within the scope of the invention.
Claims (3)
1. A preparation method of a bifunctional film capable of optimizing a cathode of a metal-air battery is characterized by comprising the following steps: which comprises the following steps:
1) Preparing a first ink, wherein polyethyleneimine PEI is selected as a carbon dioxide adsorbent, any one of polyacrylonitrile PAN, polyvinylidene fluoride PVDF and polystyrene PS is selected as an auxiliary agent, and any one or more of N, N-Dimethylformamide (DMF), dimethylacetamide DMAc, acetone AC and tetrahydrofuran THF is selected as an organic solvent, wherein the mass ratio of the carbon dioxide adsorbent to the auxiliary agent to the organic solvent is (1.5-2): 1-2.5:5.5-7.5;
2) Preparing a second ink, namely selecting tin oxide or zinc oxide nano dispersion liquid as an oxygen adsorbent, selecting any one of polyacrylonitrile PAN, polyvinylidene fluoride PVDF and polystyrene PS as an auxiliary agent, and selecting one or more of N, N-dimethylformamide DMF, dimethylacetamide DMAc, acetone AC and tetrahydrofuran THF as an organic solvent, wherein the mass ratio of the oxygen adsorbent to the auxiliary agent to the organic solvent is (1.5-2): 1-2.5:5.5-7.5;
3) Based on a coaxial electrostatic spinning process, taking the first ink as an inner layer or an outer layer printing ink, and taking the second ink as an outer layer or an inner layer printing ink;
4) Setting coaxial electrostatic spinning parameters, and carrying out coaxial electrostatic spinning;
5) And standing the fiber film prepared by coaxial electrostatic spinning on a roller for 0.5-3h for curing, and drying in a drying oven at 70-90 ℃ for 1-3h after curing.
2. The method for preparing the bifunctional thin film of the cathode of the optimized metal-air battery of claim 1, wherein the method comprises the following steps: and 3) selecting a needle with the inner diameter of 1.2-2.5mm as an outer layer needle of the coaxial electrostatic spinning nozzle, and selecting a needle with the inner diameter of 0.5-2.0mm as an inner layer needle.
3. The method for preparing the bifunctional thin film of the cathode of the optimized metal-air battery of claim 1, wherein the method comprises the following steps: the parameters of coaxial electrospinning were as follows:
the needle head is adjusted to be 10 cm to 15cm away from the collecting roller; the rotating speed of the spinning machine roller is 300-800rpm;
the flow rate of the outer layer solution is 0.5-1.5ml/h, the flow rate of the inner layer solution is 0.2-0.8ml/h, and the spinning voltage is 8-18kV.
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| US4483694A (en) * | 1982-06-24 | 1984-11-20 | Tokyo Shibaura Denki Kabushiki Kaisha | Oxygen gas permselective membrane |
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| CN213242604U (en) * | 2020-09-21 | 2021-05-18 | 北京华业阳光新能源有限公司 | Zinc-air battery |
| CN113013422A (en) * | 2021-03-05 | 2021-06-22 | 蔚蓝(广东)新能源科技有限公司 | Can adsorb CO2Metal-air battery positive electrode film and its preparing method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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