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Air electrode used for metal fuel cell and preparation method thereof

A metal fuel cell and air electrode technology, which is applied to battery electrodes, fuel cell half cells, primary battery half cells, electrical components, etc., can solve the problems of shortening the service life of air electrodes, poor consistency of air electrodes, and high power consumption. Human and material resources and other issues, to achieve the effect of easy realization of large-scale production, low production cost and simple process

Inactive Publication Date: 2018-11-02
YUNNAN ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the preparation process of metal fuel cell air electrodes adopts the method of mixing hydrophobic carbon material acetylene black or catalyst material and PTFE emulsion in a certain proportion and rolling them separately to a certain thickness of waterproof layer or catalytic layer, and then combining the pressed film layer with the conductive The air electrode is synthesized by current collector fluid pressure, and the waterproof layer, catalyst preparation, and pressing process of the catalytic layer are cumbersome, the output is low, and a large amount of manpower and material resources are required, and the prepared air electrode has poor consistency.
As a result, carbon shedding, catalyst shedding and electrolyte carbonization have occurred in the air electrode during use, which greatly shortens the service life of the air electrode

Method used

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  • Air electrode used for metal fuel cell and preparation method thereof
  • Air electrode used for metal fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Take 5cm×10cm punched stainless steel nickel-plated mesh as the conductive current collector, and pretreat the conductive current collector in a weak alkaline solution;

[0063] (2) ZrO 2 -ZnO-SiO 2 -The CaO microporous ceramic material is mixed with the binder (CMC and PTFE) at a mass percentage of 85%, wherein the mass ratio of the binder CMC to PTFE is 1:2. Add water and stir evenly, coat the slurry on one surface of the pretreated conductive current collector, and dry it in a blast oven at 80°C for 8 hours to form a microporous ceramic layer;

[0064] (3) ZrO loaded with manganese cobalt spinel 2-ZnO-SiO 2 -CaO microporous ceramics and binder CMC are mixed at 90% by mass, add water and stir evenly, coat the slurry on the other surface of the pretreated conductive current collector, and dry it in a vacuum oven at 80°C 6h, to form a catalytic layer;

[0065] (4) The conductive current collector obtained in step (3) is pressed and formed under a pressure of 60...

Embodiment 2

[0068] (1) Take a 5cm × 10cm cable-drawn nickel mesh as a conductive current collector, and pretreat the conductive current collector in an alkaline solution;

[0069] (2) ZrO 2 -Al 2 O 3 -SiO 2 -The CaO microporous ceramic material is mixed with the binder (HPMC and PTFE) in a mass ratio of 87%, wherein the mass ratio of the binder HPMC and PTFE is 2:3. Add water and stir evenly, coat the slurry on one surface of the pretreated conductive current collector, and dry it in a blast oven at 100°C for 8 hours to form a microporous ceramic layer;

[0070] (3) ZrO loaded with manganese cobalt spinel catalyst 2 -Al 2 O 3 -SiO 2 -CaO microporous ceramics and binder HPMC were mixed at a mass ratio of 85%, water was added and stirred evenly, the slurry was coated on the other side surface of the pretreated conductive current collector, and dried in a vacuum oven at 100°C 6h, to form a catalytic layer;

[0071] (4) The conductive current collector obtained in step (3) is pressed...

Embodiment 3

[0074] (1) Take 5cm×10cm punched stainless steel nickel-plated mesh as the conductive current collector, and pretreat the conductive current collector in a weak alkaline solution;

[0075] (2) ZrO 2 -Al 2 O 3 -TiO 2 -The CaO microporous ceramic material is mixed with the binder (PVA and PTFE) in a mass percentage of 80%, wherein the mass ratio of the binder PVA to PTFE is 1:3. Add water and stir evenly, coat the slurry on one surface of the pretreated conductive current collector, and dry it in a blast oven at 80°C for 8 hours to form a microporous ceramic layer;

[0076] (3) ZrO loaded with manganese cobalt spinel catalyst 2 -Al 2 O 3 -TiO 2 -CaO microporous ceramics and binder PVA are mixed by mass percentage of 80%, add water and stir evenly, coat the slurry on the other side surface of the pretreated conductive current collector, and dry it in a vacuum oven at 80°C 6h, to form a catalytic layer;

[0077] (4) The conductive current collector obtained in step (3) is...

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Abstract

The invention discloses an air electrode used for a metal fuel cell and a preparation method of the air electrode. The air electrode used for the metal fuel cell comprises a conductive current collector, a microporous ceramic layer, a waterproof layer and a catalytic layer; the microporous ceramic layer is formed on the surface of one side of the conductive current collector; the waterproof layeris formed on the surface of the microporous ceramic layer; and the catalytic layer is formed on the surface of the other side of the conductive current collector. The air electrode used for the metalfuel cell provided by the invention has excellent mechanical strength and relatively high air permeability, water resistance and high electrical conductivity, and also has relatively high catalytic activity and gas selectivity; and in the using process, the microporous ceramic layer, the waterproof layer and the catalytic layer are not easy to fall off, so that the air electrode is high in discharge voltage and relatively long in service life.

Description

technical field [0001] The invention belongs to the field of metal fuel cells, and in particular relates to an air electrode for metal fuel cells and a preparation method thereof. Background technique [0002] At present, the preparation process of metal fuel cell air electrode is to mix hydrophobic carbon material acetylene black or catalyst material with PTFE emulsion in a certain proportion and roll separately to a certain thickness of waterproof layer or catalytic layer, and then press the film layer with conductive layer. The current collector is pressed to synthesize the air electrode, and its waterproof layer, catalyst preparation and pressing process of the catalyst layer are cumbersome, the yield is low, a large amount of manpower and material resources are required, and the prepared air electrode has poor consistency. As a result, carbon shedding, catalyst shedding and electrolyte carbonization have occurred during the use of the air electrode, which greatly shorte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M12/06
CPCH01M4/8605H01M4/8828H01M4/8878H01M4/8889H01M4/8896H01M12/06
Inventor 施学金汪云华田永周燕张战胜李如飞崔涛和晓才祁云一袁野杨孟昌
Owner YUNNAN ALUMINUM