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Preparation method of fuel cell membrane electrode

A fuel cell membrane and electrode technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient bonding between the anode and cathode catalytic layer and the proton exchange membrane, short service life, and low current density

Inactive Publication Date: 2015-08-26
HYB BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of existing membrane electrodes are: the combination between the anode and cathode catalytic layer and the proton exchange membrane is not tight enough, resulting in low current density and short service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing a fuel cell membrane electrode comprises the following steps:

[0018] a. Pretreatment steps of the membrane electrode diffusion layer: put the anode and cathode with the diffusion layer into distilled water for ultrasonic treatment, take them out and put them in HNO 3 and H 2 o 2 The mixed solution was placed in a water bath at 60°C for 2 hours, and then placed in H 2 SO 4 Ultrasonic treatment in solution;

[0019] b. Preparation steps of the cathode catalyst layer: place the pretreated cathode in the dichlorotetraammine platinum solution, first exchange for 1-4 hours, then pour out the exchange waste liquid, and re-add fresh dichlorotetraammine platinum The solution is exchanged for another 1-4 hours, and then excess sodium borohydride solution is added to carry out the reduction reaction until the reduction is complete to form a cathode catalyst layer;

[0020] c. Preparation of cathode platinum black layer: place the membrane electrode tr...

Embodiment 2

[0024] A method for preparing a fuel cell membrane electrode comprises the following steps:

[0025] a. Pretreatment steps of the membrane electrode diffusion layer: put the anode and cathode with the diffusion layer into distilled water for ultrasonic treatment, take them out and put them in HNO 3 and H 2 o 2 The mixed solution was placed in a water bath at 60°C for 2 hours, and then placed in H 2 SO 4 Ultrasonic treatment is carried out in the solution at a temperature of 50-80°C;

[0026] b. Preparation steps of the cathode catalyst layer: place the pretreated cathode in the tetraammine platinum solution, exchange for 2 hours, then pour out the exchange waste liquid, add fresh tetraammine platinum solution and exchange again After 2 hours, add excess sodium borohydride solution to carry out the reduction reaction until the reduction is complete to generate the cathode catalyst layer;

[0027] c. Preparation of cathode platinum black layer: place the membrane electrode ...

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Abstract

The invention provides a preparation method of a fuel cell membrane electrode with higher efficiency and long service life. According to the preparation method, a platinum black layer is formed between a proton exchange membrane and a cathode, a platinum iridium black layer is formed between the proton exchange membrane and an anode, so that close integration of the anode catalyst layer and the cathode catalyst layer with the proton exchange membrane is ensured, it is detected by experiments that current density can be as high as 350mA / cm2, efficiency of the fuel cell membrane electrode is higher, and service life is longer.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a method for preparing a proton exchange membrane. Background technique [0002] Fuel cell power generation is recognized as the fourth power generation method after thermal power generation, hydropower generation, and nuclear power generation. The proton exchange membrane fuel cell, which has the advantages of high efficiency, high power density, low temperature operation and no pollution, is regarded as a better candidate for providing energy sources for automobiles, small and medium-sized power stations and mobile devices. The core component of a proton exchange membrane fuel cell is the membrane electrode, which is composed of a gas diffusion electrode and a proton exchange membrane. The gas diffusion electrode (including anode and cathode) is composed of a diffusion layer and a catalyst layer: the diffusion layer is composed of a conductive porous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 冯岸柏冯洪亮胡清平井明召严艳明傅昭
Owner HYB BATTERY
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