Membrane electrode structure capable of improving anti-pole-reversal capability and preparation method of membrane electrode structure

By using anti-reverse slurry prepared with anti-reverse catalyst and carbon material in the membrane electrode, the anti-reverse functional layer is prepared and the membrane electrode structure is optimized, and the problem of difficult control of anti-reverse slurry stability and catalyst uniformity is solved, significantly extending the anti-reverse time and reducing costs.

CN119725643APending Publication Date: 2025-03-28SUNRISE POWER CO LTD
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Patent Information

Application Number
CN202411811892.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-10
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In the existing anti-reverse gas diffusion layer structure and preparation method, the anti-reverse slurry has poor stability, and the load capacity and load uniformity of the anti-reverse catalyst are difficult to control, which affects the anti-reverse slurry.

Method used

An anti-reverse slurry prepared from an anti-reverse catalyst, carbon material, solution and dispersant is used to prepare an anti-reverse functional layer on the microporous layer side of the anode diffusion layer by spraying, coating or transfer, and a hydrophilic layer is formed on the surface of the anode catalytic layer to optimize the membrane electrode structure to improve the anti-reverse ability.

Benefits of technology

By adding carbon materials, the stability of the anti-reverse slurry and the uniformity of the catalyst are improved, and the anti-reverse slurry time is extended to the original 2-10 times, reducing material costs, and improving the service life of the membrane electrode.

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Abstract

The invention provides a membrane electrode structure for improving anti-pole-reversal capability and a preparation method. The membrane electrode structure comprises an anode structure, a proton exchange membrane and a cathode structure which are arranged in sequence, the anode structure comprises an anode diffusion layer, an anti-reverse pole functional layer, an anode catalyst layer and a hydrophilic layer which are arranged in sequence, and the hydrophilic layer is close to the proton exchange membrane; and the anti-reverse pole functional layer is prepared from anti-reverse pole slurry prepared from an anti-reverse pole catalyst, a carbon material, a # imgabs0 # solution and a dispersing agent. According to the technical scheme of the invention, the problem that the anti-reverse-pole performance is influenced due to the fact that the adopted anti-reverse-pole slurry is poor in stability and the anti-reverse-pole catalyst loading capacity and the loading uniformity are difficult to control in the structure and the preparation method of the existing anti-reverse-pole gas diffusion layer is solved.
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