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Metal-air battery positive electrode membrane capable of adsorbing CO2 and preparation method of metal-air battery positive electrode membrane

A technology of air battery and cathode film, applied in battery electrodes, fuel cell type half cells and primary cell type half cells, circuits, etc.

Inactive Publication Date: 2021-06-22
蔚蓝(广东)新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the metal-air battery is currently a research and development hotspot for portable energy storage devices and has incomparable advantages compared with other types of batteries, its open system will cause many problems during operation.

Method used

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  • Metal-air battery positive electrode membrane capable of adsorbing CO2 and preparation method of metal-air battery positive electrode membrane
  • Metal-air battery positive electrode membrane capable of adsorbing CO2 and preparation method of metal-air battery positive electrode membrane
  • Metal-air battery positive electrode membrane capable of adsorbing CO2 and preparation method of metal-air battery positive electrode membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Adsorbable CO 2 The preparation method of metal-air battery cathode film, comprises steps:

[0028] (1) Put 50g CaO and 280mL ethanol in a beaker, turn on the high-speed disperser and stir at a speed of 800r / min for 30min, until CaO is uniformly dispersed in ethanol to obtain an absorption liquid;

[0029] (2) Keep stirring the absorption liquid, add 75g of polytetrafluoroethylene emulsion (PTFE) with a solid content of 60% into the absorption liquid at room temperature, and stir the mixed solution for 2h with a rotating speed of 1500r / min to obtain a CaO-PTFE emulsion ;

[0030] (3) Add the CaO-PTFE emulsion prepared above into a pneumatic booster spray gun, evenly spray on the blank side of the nickel mesh collector fluid, and spray the manganese-lanthanide catalyst on the other side;

[0031] (4) Use a pair of rollers to roll at a high temperature of 100°C until the thickness of the membrane electrode is 0.7mm, put the air electrode membrane in a vacuum atmosphere ...

Embodiment 2

[0033] Adsorbable CO 2 The preparation method of metal-air battery cathode film, comprises steps:

[0034] (1) Mix 80g Na 2 o 2 Put in a beaker with 400mL isopropanol, turn on the high-speed disperser and stir at a speed of 600r / min for 60min until Na 2 o 2 Uniformly dispersed in isopropanol to obtain absorption liquid;

[0035] (2) Keep stirring the absorption liquid, add 50g PTFE into the absorption liquid at normal temperature, and stir the mixed liquid for 3h at a speed of 1200r / min to obtain Na 2 o 2 - PTFE emulsion;

[0036] (3) Na prepared above 2 o 2 - PTFE emulsion is added to the pneumatic booster spray gun, evenly sprayed on the blank side of the nickel mesh collector, and the other side is sprayed with manganese-lanthanide catalyst;

[0037] (4) Use a pair of rollers to roll at a high temperature of 120 ° C until the thickness of the membrane electrode is 0.8 mm, put the air electrode film in a vacuum atmosphere furnace for sintering at 500 ° C for 3 h, an...

Embodiment 3

[0039] Adsorbable CO 2 The preparation method of metal-air battery cathode film, comprises steps:

[0040] (1) Put 100g of soda lime and 500mL of acetone in a beaker, turn on the high-speed disperser and stir for 60min at a speed of 500r / min, until the soda lime is evenly dispersed in the acetone to obtain an absorption solution;

[0041] (2) Keep stirring the absorption solution, add 100g PTFE in the absorption solution at normal temperature, and stir the mixed solution for 3h with a rotating speed of 2000r / min to obtain a soda lime-PTFE emulsion;

[0042] (3) The soda lime-PTFE emulsion of above-mentioned preparation is added in the pneumatic booster spraying gun, evenly sprayed on the blank side of the nickel mesh collector fluid, the other side is then sprayed with manganese lanthanide catalyst;

[0043] (4) Use a pair of rollers to roll at a high temperature of 100 ° C until the thickness of the membrane electrode is 0.9 mm, put the air electrode film in a vacuum atmospher...

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Abstract

The invention discloses a preparation method of a metal-air battery positive electrode membrane capable of adsorbing CO2. The preparation method comprises the following steps of (1) mixing a CO2 absorbent with a solvent, and stirring to obtain an absorption liquid; (2) adding PTFE into the absorption liquid, and stirring to obtain an emulsion; (3) spraying the emulsion at one side of a current collector, and spraying a catalyst at the other side of the current collector; and (4) rolling the sprayed current collector in the step (3), and sintering the rolled current collector in an argon atmosphere furnace to obtain the metal-air battery positive electrode membrane. The metal-air battery positive electrode membrane has high porosity and good hydrophobicity, has CO2 capture capability, effectively prevents CO2 from entering the battery to react with an electrolyte, reduces carbonation, reduces the content of carbonate in the electrolyte, slows down electrolyte aging, improves the secondary starting performance of a metal-air battery, and prolongs the service life of the metal-air battery. The invention also provides the air battery positive electrode membrane prepared by the method.

Description

technical field [0001] The invention relates to the technical field of metal-air batteries, more specifically to a CO 2 Metal-air battery cathode film and preparation method thereof. Background technique [0002] With the rapid development of energy storage equipment technology, a variety of electronic equipment has begun to become popular, and people's requirements for chemical power sources have also increased, and their functional requirements have also increased. Therefore, there is an urgent need in the market for an environmentally friendly battery with high specific energy and safety. Metal-air batteries, such as zinc-air batteries (ZABs), use air as the negative electrode active material and metal as the positive electrode active material. The continuous air in the environment passes through the active positive electrode membrane in the battery to reduce oxygen and output energy. , so the capacity of the metal-air battery depends only on the consumption of the meta...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M12/06
CPCH01M4/8828H01M4/8896H01M4/8889H01M4/8605H01M4/8663H01M4/8657H01M12/06H01M2004/8689
Inventor 吴继昌呼继梅陈冬芬林梓彬
Owner 蔚蓝(广东)新能源科技有限公司
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