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Preparation technique for membrane electrode of proton exchange film fuel cell

A proton exchange membrane and fuel cell membrane technology, which is applied to fuel cell parts, fuel cells, battery electrodes, etc., can solve the problems of proton exchange membrane swelling, complex preparation process, and high catalyst dosage, and achieves improved effective contact and simplified Preparation process, the effect of simplifying the preparation process

Active Publication Date: 2009-08-19
辽宁沐与康中氢燃料电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a preparation process for proton exchange membrane fuel cell membrane electrodes in order to improve the deficiencies such as swelling and wrinkling of the proton exchange membrane during the preparation process, excessive catalyst consumption, and complicated preparation process in the existing preparation process

Method used

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  • Preparation technique for membrane electrode of proton exchange film fuel cell
  • Preparation technique for membrane electrode of proton exchange film fuel cell
  • Preparation technique for membrane electrode of proton exchange film fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Hydrophobic treatment of carbon paper / carbon cloth: firstly, carbon paper (as the current collecting layer) is dipped in 35% PTFE emulsion to obtain hydrophobic carbon paper / carbon cloth.

[0040] Leveling treatment of carbon paper: Grind Vulcan-72 carbon powder in 20% PTFE emulsion high-energy ball to emulsified carbon paste, and use screen printing to evenly coat and water-repellent the surface of carbon paper. A carbon paper with a microdiffusion layer is formed. The loading amount of carbon powder in the micro-diffusion layer is 3mg / cm 2 . The carbon paper has the function of managing the gas distribution of the fuel cell and at the same time collecting the current.

[0041] Proton exchange membrane treatment: first with 3% H 2 o 2 Hydrogen peroxide to 5*5cm 2 The nafion212 proton exchange membrane was treated for 1 hour to remove surface pollutants, and the proton exchange membrane was boiled with double distilled water and washed twice. After washing, store ...

Embodiment 2

[0047] Adopt treated charcoal cloth, micro-diffusion layer is treated with example 1.

[0048] The processing of proton exchange membrane is the same as example 1

[0049] Preparation of catalyst slurry: 1) Get 5ml of perfluorosulfonic acid solution solution (Nafion520, 5wt%, DuPont company, U.S.) and pour it into a small beaker 2) Weigh the Pt / C catalyst according to the ratio of catalyst to Nafion mass 2:1 (Shanghai Panye), adding 40ml of ethanol without adding pore-forming agent, and performing high-energy ball milling for 1 hour to fully disperse the catalyst and fully mix it with Nafion to prevent the slurry from agglomerating during the spraying process. Preparation of Membrane Electrode: 1) Put the fully treated Nafion212 membrane on a glass plate, fix it with adhesive tape around it, and wipe off the water on the surface of the membrane with a glass rod. Place the glass plate on a heating platform and heat at 150°C to volatilize the moisture on the surface of the prot...

Embodiment 3

[0051] The micro-diffusion layer of carbon paper is treated with example 1.

[0052] The processing of proton exchange membrane is the same as example 1

[0053] The preparation of catalyst slurry: 1) get 1.2g 5% Nafion solution (DuPont company, the U.S.) and pour in the small beaker 2) weigh PtRu / C catalyst (Shanghai Panye) according to the ratio of catalyst and Nafion mass 5:1 , add 6ml of deionized water, add 2.4g of ammonium sulfate as a pore-forming agent and carry out high-energy ball milling for 1 hour to fully disperse the catalyst and mix it with Nafion to prevent the slurry from agglomerating during the spraying process.

[0054] Membrane electrode preparation: 1) Place the fully treated Nafion112 membrane on a smooth quartz plate, fix it with a strip-shaped fixing plate around it, and wipe off the moisture on the membrane surface with absorbent cotton. Place the graphite plate on a heating platform and heat it at 180°C to volatilize the moisture on the surface of t...

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Abstract

The invention relates to a technology that prepares a proton exchange membrane fuel cell electrode, comprising three parts of a pre-process of the proton exchange membrane, a preparation of a catalyst slurry and spray coating of a membrane electrode. The technology provided by the invention solves the problems that in prior art preparation process, the proton exchange membrane swells and rucks and the dosage of the catalyst is high and the preparation process is complicated. The prepared proton exchange resin has great elasticity and adhesive property, which is beneficial for improving adhesion of the catalyst layer and the proton exchange membrane and improves utilization ratio of the catalyst.

Description

technical field [0001] The invention relates to a preparation method of a membrane electrode, which belongs to the field of fuel cells; in particular, it relates to a preparation process of a membrane electrode of a proton exchange membrane fuel cell. Background technique [0002] A fuel cell is an efficient power generation device that directly converts chemical energy of matter into electrical energy. It is not limited by the Carnot cycle and has the advantages of high efficiency, cleanliness, and portability. Therefore, the development of fuel cells plays an important role in improving the utilization level of new energy, improving people's living environment, and the survival and development of human beings. [0003] Proton exchange membrane fuel cell is a kind of fuel cell, and its reaction mechanism is that hydrogen is adsorbed on the anode catalyst of the fuel cell and cracked into hydrogen ions (protons) and electrons. Hydrogen ions permeate to the cathode through t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M4/88H01M8/1004
CPCY02E60/50Y02P70/50
Inventor 邵宗平孙良良冉然蔡锐
Owner 辽宁沐与康中氢燃料电池有限公司
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