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Process for producing fuel cell film electrode

A fuel cell membrane and manufacturing process technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems such as membrane deformation, reduced membrane conductivity, and reduced success rate of membrane electrodes

Inactive Publication Date: 2004-04-28
江苏隆源双登电源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is easy to cause deformation of the film and decomposition of internal groups, reduce the conductivity of the film, or cause a short circuit of the film, and may also change the crystal form of the metal particles in the catalyst, affecting the catalytic activity.
At the same time, this kind of hot pressing often cannot make the catalyst maintain ion channels through the ion polymer and the membrane.
These will reduce the success rate of membrane electrode fabrication

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The first step: control the weight ratio of pure PTFE amount in BP2000 type superconducting carbon powder and polytetrafluoroethylene emulsion to be 1: 0.2, with the mixed solution of ethanol and water of volume ratio 5: 1 as dispersant, superconducting carbon The mixture of powder and PTFE emulsion was emulsified in an ultrasonic mill for 5 minutes.

[0019] The second step: use the spray gun to evenly spray the above mixture on the surface of the hydrophobic carbon paper treated with PTFE. The carbon paper is then sintered.

[0020] Step 3: heat-press the above-mentioned carbon paper on a flat-plate hot press at 160° C. with a pressure of 8 MPa for 60 seconds.

[0021] the fourth step:

[0022] Mix 1 g of platinum-carbon catalyst, 0.05 g of 30 wt % polytetrafluoroethylene, 5 g of water, and 2 g of glycerin with an ultrasonic stirrer to form No. 2 paste.

[0023] Mix 0.2g of platinum carbon catalyst, 0.25g of 30wt% polytetrafluoroethylene, 5g of water, and 0.4g of g...

Embodiment 2

[0029] The first step: control the weight ratio of pure PTFE amount in BP2000 type superconducting carbon powder and polytetrafluoroethylene emulsion to be 1: 0.5, with the mixed solution of ethanol and water of volume ratio 0.2: 1 as dispersant, superconducting carbon The mixture of powder and PTFE emulsion was emulsified in an ultrasonic mill for 5 minutes.

[0030] The second step: use the spray gun to evenly spray the above mixture on the surface of the hydrophobic carbon paper treated with PTFE. The carbon paper is then sintered.

[0031] Step 3: heat-press the above-mentioned carbon paper on a flat-plate hot press at 180° C. with a pressure of 5 MPa for 60 seconds.

[0032] the fourth step:

[0033] Mix 1 g of platinum-carbon catalyst, 0.05 g of 30 wt % polytetrafluoroethylene, 5 g of water, and 5 g of glycerin with an ultrasonic stirrer to form No. 2 paste.

[0034] Mix 0.5g of platinum-carbon catalyst, 0.15g of 30wt% polytetrafluoroethylene, 5g of water, and 5g of g...

Embodiment 3

[0041] The first step: control the weight ratio of pure PTFE amount in BP2000 type superconducting carbon powder and polytetrafluoroethylene emulsion to be 1: 0.3, with the mixed solution of ethanol and water of volume ratio 0.5: 1 as dispersant, superconducting carbon The mixture of powder and PTFE emulsion was emulsified in an ultrasonic mill for 5 minutes.

[0042] The second step: use the spray gun to evenly spray the above mixture on the surface of the hydrophobic carbon paper treated with PTFE. The carbon paper is then sintered.

[0043] Step 3: heat-press the above-mentioned carbon paper on a flat-plate hot-press machine at 170° C. with a pressure of 3 MPa for 90 seconds.

[0044] the fourth step:

[0045] Mix 1 g of platinum-carbon catalyst, 0.05 g of 30 wt % polytetrafluoroethylene, 5 g of water, and 4 g of glycerin with an ultrasonic stirrer to form No. 2 paste.

[0046] Mix 0.7g of platinum carbon catalyst, 0.2g of 30wt% polytetrafluoroethylene, 5g of water, and ...

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PUM

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Abstract

A processing technology for a fuel battery film electrode characterizes in using chromaticity printing to process multiplayer catalyst to make its inner layer composition to form density gradient along thickness direction, applying superconductive ethyne to process transient layer and applying supersonic wave welding to weld film electrode components increasing usability of noble metal, combination strength of film electrode system, preventing films from damage and distortion and increasing its power density to 0.45-0.5w / cm2.

Description

technical field [0001] The invention relates to a manufacturing process of a fuel cell membrane electrode, which is suitable for manufacturing three-in-one components of a proton exchange membrane fuel cell and belongs to the technical field of fuel cells. Background technique [0002] Proton exchange membrane fuel cell, because of its unique fast start performance, excellent working stability, no need to charge, zero emission, no noise, etc., has become a popular choice for electric vehicles, residential buildings, small and medium-sized power stations, communications and UPS power supplies, A very competitive alternative power supply variety for portable electronic devices, etc. Membrane electrodes are the core components of proton exchange membrane fuel cells, and their performance directly affects the performance of fuel cells. At present, the research direction of the manufacturing process of the membrane electrode focuses on improving the utilization rate of the noble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 孙延先刘晶华佘沛亮祝士平
Owner 江苏隆源双登电源有限公司
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