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Making method of porous high-performance metal fuel cell oxygen electrode

A technology for metal fuel cells and manufacturing methods, which is applied in battery electrodes, fuel cell-type half-cells, primary battery-type half-cells, and electrode manufacturing, and can solve the problems of low porosity, poor catalytic effect of the catalytic layer, and poor battery discharge performance. advanced questions

Active Publication Date: 2017-12-05
潘科艳 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 1. Low electrode porosity and low oxygen permeability;
[0012] 2. Due to the low porosity, the catalytic effect of the catalytic layer is poor, and the discharge performance of the battery is not high;
[0014] 4. Uneven distribution of pore size and pores may easily cause poor waterproof performance of the waterproof layer
[0015] 5. This sandwich-compressed electrode is likely to cause the waterproof layer and the catalytic layer to separate from the current collector, reducing the life of the electrode

Method used

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  • Making method of porous high-performance metal fuel cell oxygen electrode
  • Making method of porous high-performance metal fuel cell oxygen electrode
  • Making method of porous high-performance metal fuel cell oxygen electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The manufacturing method of the porous high-performance metal fuel cell oxygen electrode of the present invention is to use a volatile dispersant to replace the pore-forming agent, and integrally form the waterproof layer, the current collector and the catalytic layer in a molding mold. The electrode material is formed through a forming die instead of being rolled and formed by a rolling machine.

[0059] Specifically include the following steps:

[0060] (1) Catalyst layer 2 materials are dispersed in dispersant, add binding agent, evenly stir and disperse; The weight volume ratio of catalytic layer material and dispersant is 20g: 1L; The weight volume ratio of catalytic layer material and binding agent is 20g: 1L;

[0061] (2) Disperse the material of the waterproof layer 1 into the dispersant, add the binder, stir and disperse evenly; the weight-to-volume ratio of the waterproof layer material to the dispersant is 60g: 1L; the weight-to-volume ratio of the waterproo...

Embodiment 2

[0068] Described dispersant is ethanol,

[0069] The ratio of the catalyst layer material and dispersant described in step (1) is 10g: 1L;

[0070] The ratio of the waterproof layer material to the dispersant in step (2) is 10g:1L.

[0071] Described binding agent is PTFE;

[0072] The ratio of the catalytic layer material and the binding agent described in step (1) is 10g: 1L;

[0073] The ratio of the waterproof layer material to the binder in step (2) is 10g:1L.

[0074] The pore diameter of the filter paper described in step (3) is 30 μm.

[0075] The short fibers are plastic fibers.

[0076] Described heat treatment comprises the following steps:

[0077] (1) Dry it on a hot press at 90°C for about 10 minutes at a pressure of 35kgf / cm 2 ;

[0078] (2) After drying, process it on a press at 250°C for 3 minutes and a pressure of 15kgf / cm 2 .

[0079] All the other are with embodiment 1.

Embodiment 3

[0081] Described dispersant is propanol,

[0082] The ratio of the catalytic layer material and dispersant described in step (1) is 150g: 1L;

[0083] The ratio of the waterproof layer material to the dispersant in step (2) is 150g: 1L.

[0084] The binder is CMC;

[0085] The ratio of the catalyst layer material described in step (1) to the binding agent is 150g: 1L;

[0086] The ratio of the waterproof layer material to the binder in step (2) is 150g: 1L.

[0087] The pore diameter of the filter paper described in step (3) is 50 μm.

[0088] The short fibers are asbestos fibers.

[0089] Described heat treatment comprises the following steps:

[0090] (1) Dry it on a hot press at 90°C for about 20 minutes at a pressure of 35kgf / cm 2 ;

[0091] (2) After drying, process it on a press at 250°C for 15 minutes at a pressure of 15kgf / cm 2 .

[0092] All the other are with embodiment 1.

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Abstract

The invention relates to a making method of a porous high-performance metal fuel cell oxygen electrode. The method is characterized in that a volatile dispersant is used to substitute a pore forming agent, and a waterproof layer, a current collector and a catalysis layer are integrally molded in a molding die. A result of discharge test of the oxygen electrode made through the method at room temperature under a current density of 35 mA / cm<2> shows that the oxygen electrode can work for 6000 h or more without electrolyte seepage; and the discharge current density of the oxygen electrode made through the method can exceed 500 mA / cm<2>.

Description

technical field [0001] The invention relates to an oxygen electrode of a metal fuel cell, in particular to a method for manufacturing a porous high-performance oxygen electrode of a metal fuel cell. Background technique [0002] A metal fuel cell is a device that generates electricity by electrochemically reacting metal and oxygen, usually including magnesium-air fuel cells, aluminum-air fuel cells, lithium-air fuel cells, and zinc-air fuel cells. [0003] This type of fuel cell consists of metal electrodes, diaphragms, electrolytes, oxygen electrodes and casings. The oxygen electrode is a very important part, which often determines the performance and working life of the fuel cell. The object of key research and development. [0004] The oxygen electrode is mainly composed of three parts: 1) waterproof layer, 2) catalytic layer, and 3) current collector. [0005] At present, for the production of oxygen electrodes, the following production methods are mainly used: [000...

Claims

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Application Information

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IPC IPC(8): H01M12/06H01M4/04H01M4/86
CPCH01M4/0404H01M4/8605H01M4/8652H01M12/06Y02E60/10
Inventor 潘科艳陈晓鹰
Owner 潘科艳