Wuhan Hydrogen Energy and Fuel Cell Industry Technology Research Institute Co., Ltd.

Lingfeng Gao

Jianan Wang

Tianshu Liao

Chen Chen

Feng Cheng

Qiang Liu

Huixuan Liu

Yuting Zou

The invention discloses a catalyst coated membrane and preparation method thereof, membrane electrode and fuel cell. The above preparation method includes: firstly, adding sodium type resin to an aqueous-alcohol dispersion of Pt/C catalyst, and stirring and dispersing to obtain a catalyst slurry; secondly, coating the catalyst slurry onto a PTFE membrane, drying at room temperature, and then transferring to an sintering box for heat treatment to obtain a catalyst coated PTFE membrane; thirdly, preparing a proton membrane with catalyst transfer layer by thermocompression transfer of the catalyst coated PTFE membrane and a proton exchange membrane; finally, protonating the proton membrane with catalyst transfer layer to obtain a catalyst coated membrane. The present invention utilizes the great thermal stability of sodium type resin to enhance the crystallization degree of Nafion-H in the catalyst coated membrane through heat treatment, thereby improving the resistance to free radical oxidation and corrosion.

Catalyst coated membrane and preparation method thereof, membrane electrode and fuel cell

Disclosed is a membrane electrode, fuel cell gas diffusion layer, and process for preparing the fuel cell gas diffusion layer, the process comprising: S1 coating microporous layer slurry on the surface of hydrophobic carbon paper; the microporous layer slurry was obtained by dispersing mixture of carbon powder, polytetrafluoroethylene dispersion solution, thickener, and solvent; S2 moving the hydrophobic carbon paper coated with the microporous layer slurry to a porous ceramic plate, and connecting a vacuum pump to the porous ceramic plate, vacuumed for adsorption pre-infiltration treatment, and then dried. S3 continuing to coat the microporous layer slurry on the hydrophobic carbon paper dried in step S2, then drying, and then sintering at 250-400&#xb0; C. to obtain a gas diffusion layer. The beneficial effects of this disclosure include: this disclosure improve the water vapor erosion resistance of the microporous layer and the durability of the gas diffusion layer.

Membrane electrode, fuel cell gas diffusion layer and process for preparing the fuel cell gas diffusion layer

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Wuhan, China

Lingfeng Gao