Proton exchange membrane fuel cell ccm membrane electrode and preparation method thereof

Abstract

The invention relates to a preparation method of a ccm membrane electrode of a proton exchange membrane fuel cell and a product thereof. The preparation method comprises the following steps: providinga catalyst slurry, a two-release membrane and a proton exchange membrane; A release film is placed on a coating machine, and a catalyst slurry is coated on the release film by a coating tool to obtain a cathode transfer medium; placing another release film on a coating machine, coating catalyst slurry on the release film by using a coating tool, and obtaining an anode transfer medium; drying a cathode transfer medium and an anode transfer medium to obtain a dried cathode transfer medium and an anode transfer medium; placing the dried cathode transfer medium and the anode transfer medium on both sides of the proton exchange membrane respectively, and then hot-pressed to transfer, and then the release membranes in the cathode transfer medium and the anode transfer medium are stripped off respectively to obtain the ccm membrane electrodes of the proton exchange membrane fuel cell. By using the release film as the transfer medium, the catalyst transfer efficiency is high and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of fuel cell preparation, in particular to a CCM membrane electrode of a proton exchange membrane fuel cell and a preparation method thereof. Background technique [0002] Fuel cell technology is currently on the cusp of large-scale market application, and membrane electrodes are the core components of fuel cells, and the performance of the cells is directly affected by them. [0003] At present, there are various membrane electrode preparation technologies, which are mainly divided into GDE method and GDL method. The GDE method is to coat the catalyst on the gas diffusion layer to form a catalytic layer, and then use hot pressing technology to coat the gas diffusion layer, catalyst layer, and proton exchange membrane. Combined together to form a membrane electrode; the GDL method is to coat the catalyst on the proton exchange membrane to form a ccm (catalyst coated membrane, which refers to the catalyst / pro...

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Problems solved by technology

In the GDL method, most of them are prepared by pneumatic spraying method and ultrasonic spraying method. The catalyst solution is evenly sprayed on the proton membrane under certain environmental conditions. However, when the catalyst solution directly contacts the proton membrane, the swelling and wrinkling of the membrane will occur, resulting in Curling, uneven film plane, increasing the difficulty of the process in the subsequent flip spraying process

[0004] Viewed separately, both the GDE method and the GDL method in the prior art have imperfections. How to solve the catalyst utilization rate and the proton membrane curling in production are problems that need to be solved urgently.

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