Fuel cell membrane electrode and preparation method thereof

By providing a porous layer and a multi-layer resin layer in the fuel cell membrane electrode, the problem of catalytic layer cracking is solved, the binding force and battery life are improved, while maintaining battery performance.

CN119695170APending Publication Date: 2025-03-25CHINA AUTOMOTIVE INNOVATION CORP
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Patent Information

Application Number
CN202411894684.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

During the reaction, the catalytic layer cracks due to the swelling and drying of the proton exchange membrane, which affects the battery life. The existing modification methods will reduce the battery performance when improving the binding force of the catalytic layer.

Method used

A fuel cell membrane electrode is designed, including a proton exchange membrane, at least two cathode catalytic layer, a porous layer and a multi-layer resin layer, which is prepared by spraying method to promote liquid and gas transmission between cathode catalytic layers and enhance interlayer binding force.

Benefits of technology

It effectively improves the bonding force of the cathode catalytic layer, prevents cracking, extends the life of the membrane electrode, and maintains battery performance.

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Abstract

The invention discloses a fuel cell membrane electrode and a preparation method thereof. The fuel cell membrane electrode comprises a proton exchange membrane; the at least two cathode catalyst layers are located on one side of the proton exchange membrane, and a porous layer is arranged between every two adjacent cathode catalyst layers; and a plurality of resin layers, wherein the resin layers are arranged between the adjacent cathode catalyst layer and the proton exchange membrane and between the adjacent cathode catalyst layer and the porous layer. The porous layer and the resin layer are arranged in the cathode catalyst layer, so that the binding force of the cathode catalyst layer can be improved, the cathode catalyst layer is prevented from cracking, violent membrane electrode reaction caused by cracking of the catalyst layer is avoided, and the service life of the membrane electrode of the fuel cell is prolonged.
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