Membrane electrode of proton exchange membrane fuel cell and preparation method of membrane electrode

A proton exchange membrane, fuel cell membrane technology, applied in the direction of fuel cells, battery electrodes, circuits, etc., can solve the problems of reducing the performance stability and service life of fuel cells, prone to agglomeration, and increased production, and achieve good anode water. Management ability, reducing the difficulty of the preparation process, and the effect of a simple preparation method

Active Publication Date: 2018-02-02
NAT ENG RES CENT OF ADVANCED ENERGY STORAGE MATERIALS SHEN ZHEN LTD CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the current development situation, these measures have certain defects and cannot achieve the ideal self-humidification effect.
For example, the inorganic particles added in the MEA components are prone to agglomeration or loss after working for a long time, thereby reducing the performance stability and service life of the fuel cell; the polymer additives will increase the resistance of the membrane electrode, and the compatibility of the polymer Sexual problems will also increase the difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing the membrane electrode of a proton exchange membrane fuel cell is carried out according to the following steps:

[0026] Ⅰ Pretreatment of proton exchange membrane: Nafion212 proton exchange membrane is soaked in hydrogen peroxide at a temperature of 80℃ and a mass concentration of 5% for 1 hour, rinsed with deionized water, and then placed at a temperature of 80℃ and a molar concentration of 1mol / Soak in L sulfuric acid solution for 1 hour, and finally rinse with deionized water;

[0027] Ⅱ Preparation of the catalyst slurry for the anode inner layer: weigh the mass of the catalyst, 5% Nafion solution, deionized water, isopropanol and ethylene glycol in proportion, where the catalyst is Pt / C with a Pt content of 40%, and the mass of Nafion 30% of the catalyst mass. The mass of deionized water, isopropanol and ethylene glycol is controlled to 2 according to the volume ratio of deionized water, isopropanol and ethylene glycol 1:10:1 and the solid conte...

Embodiment 2

[0033] A method for preparing the membrane electrode of a proton exchange membrane fuel cell is carried out according to the following steps:

[0034] Ⅰ Pretreatment of proton exchange membrane: Nafion212 proton exchange membrane is soaked in hydrogen peroxide at a temperature of 70℃ and a mass concentration of 5% for 2 hours, rinsed with deionized water, and then at a temperature of 70℃ and a molar concentration of 0.5mol / L sulfuric acid solution for 2h, and finally rinse with deionized water;

[0035] Ⅱ Preparation of the catalyst slurry for the anode inner layer: weigh the mass of the catalyst, 5% Nafion solution, deionized water, isopropanol and ethylene glycol in proportion, where the catalyst is Pt / C with a Pt content of 60%, and the mass of Nafion It is 50% of the catalyst mass. The mass of deionized water, isopropanol and ethylene glycol is controlled to 1.5 according to the volume ratio of deionized water, isopropanol and ethylene glycol 1:14:2 and the solid content of th...

Embodiment 3

[0041] A method for preparing the membrane electrode of a proton exchange membrane fuel cell is carried out according to the following steps:

[0042] Ⅰ Pretreatment of proton exchange membrane: Nafion212 proton exchange membrane is soaked in hydrogen peroxide at a temperature of 75℃ and a mass concentration of 3% for 2h, rinsed with deionized water, and then at a temperature of 75℃ and a molar concentration of 0.7mol / L sulfuric acid solution for 2h, and finally rinse with deionized water;

[0043] Ⅱ Preparation of the catalyst slurry for the anode inner layer: Weigh the mass of the catalyst, 5% Nafion solution, deionized water, absolute ethanol and butyl acetate in proportion, wherein the catalyst is Pt / C with a Pt content of 50%, Nafion’s The mass is 40% of the catalyst mass. The mass of deionized water, absolute ethanol and butyl acetate is based on the volume ratio of deionized water, absolute ethanol and butyl acetate 1:12:2 and the solid content of the catalyst slurry in the...

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PUM

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Abstract

The invention provides a membrane electrode of a proton exchange membrane fuel cell. A negative electrode catalytic layer is coated on a surface of a proton exchange member, a positive electrode innercatalytic layer and a positive electrode outer catalytic layer are sequentially coated on the other surface of the proton exchange membrane, gas diffusion layers are respectively arranged at outer sides of the negative electrode catalytic layer and the positive electrode outer catalytic layer by hot pressing, the positive electrode inner catalytic layer comprises a catalyst and proton exchange resin, the mass of the proton exchange resin accounts for 30-50% of the mass of the catalyst, the positive electrode outer catalyst comprises a catalyst, proton exchange resin and PTFE, the mass of theproton exchange resin accounts for 5-15% of the mass of the catalyst, and the mass of the PTFE accounts for 3-6% of the mass of the catalyst. The invention also provides a preparation method for the membrane electrode of the proton exchange fuel cell. The membrane electrode is favorable in stability, and the preparation method is simple.

Description

Technical field [0001] The invention relates to a membrane electrode of a proton exchange membrane fuel cell and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is an efficient and environmentally friendly way of generating electricity. Its energy efficiency conversion rate exceeds 60%, which is much higher than the 30% to 35% energy conversion efficiency of internal combustion engines. In addition, the fuel cell uses hydrogen as fuel, and the fuel is renewable. And the source is wide, and the discharge is only water, which is of special significance to the national energy strategy and environmental protection. As the core component of the fuel cell, the membrane electrode (MEA) directly affects the output performance and service life of the fuel cell; moreover, the membrane electrode constitutes the main part of the fuel cell cost, which currently accounts for about 69%. Therefore, how to improve the performance of the memb...

Claims

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Application Information

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IPC IPC(8): H01M8/1004H01M4/86
CPCH01M4/8663H01M8/1004Y02E60/50
Inventor 钟发平倪江鹏欧腾蛟陈功哲
Owner NAT ENG RES CENT OF ADVANCED ENERGY STORAGE MATERIALS SHEN ZHEN LTD CO
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