Fuel cell membrane electrode, preparation method thereof and fuel cell

Abstract

The invention relates to a fuel cell membrane electrode, a preparation method thereof and a fuel cell. The fuel cell membrane electrode comprises an anode gas diffusion layer, an anode catalyst layer, a proton membrane, a cathode catalyst layer, a cathode gas diffusion layer and a sealing part, the anode catalyst layer comprises a first anode catalyst layer and a second anode catalyst layer; the anode first catalyst layer and the cathode catalyst layer are respectively arranged on two sides of the proton membrane; a second anode catalyst layer is arranged between the first anode catalyst layer and the anode gas diffusion layer; the cathode gas diffusion layer is arranged on one side, far away from the proton membrane, of the cathode catalyst layer; and the sealing part is used for fixing the anode first catalyst layer, the proton membrane and the cathode catalyst layer. According to the invention, the anode first catalyst layer and the cathode catalyst layer are arranged and are fixed with the proton membrane by adopting the sealing parts, so that the reaction activity of the fuel cell is ensured; and by arranging the second catalyst layer of the anode, the anti-pole-reversal capability and durability of the membrane electrode of the fuel cell are improved.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a fuel cell membrane electrode, in particular to a fuel cell membrane electrode, a preparation method thereof and a fuel cell. Background technique [0002] Hydrogen fuel cells use hydrogen and oxygen to react to convert chemical energy directly into electrical energy. Because proton exchange membrane fuel cells have the characteristics of low operating temperature, fast start-up, high power density, and mature applications, they are widely used in automobiles. At present, although my country's commercial vehicle ownership only accounts for about 12% of the total number of automobiles, it has created road traffic CO2. 2 Therefore, hydrogen fuel cells will be an effective solution for commercial vehicles to achieve "carbon peak" and "carbon neutrality". At present, the service life of commercial vehicle fuel cells is 10,000-15,000 hours, which is not yet comparable to that of i...

AI Technical Summary

Problems solved by technology

[0007] In the above technical scheme, the anti-reverse slurry and the anode slurry are blended to prepare the anode catalytic layer. Although the anti-reverse performance of the battery can be improved, the HOR reaction activity of the anode catalytic layer is seriously reduced, thereby reducing the overall performance of the battery; the anti-reverse slurry is used alone Prepared to the periphery of the anode catalytic layer, although the anode HOR activity can be guaranteed, it can only improve the edge membrane perforation phenomenon, which leads to the inability to resist the reverse polarity phenomenon generated in the central area of ​​the membrane electrode

[0008] How to improve the anti-reversal performance of the membrane electrode in the fuel cell and solve the problem of membrane electrode damage caused by the voltage reversal caused by the insufficient supply of anode fuel is a technical problem that hydrogen fuel cells need to solve urgently

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