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Abstract

This invention discloses fabrication methods for membrane electrode assemblies of proton exchange membrane fuel cells, including gas diffusion electrodes. The fabrication methods of gas diffusion electrodes include the following steps: fabricating a conductive substrate; forming a layer of carbon containing material onto said conductive substrate; subjecting said conductive substrate with said carbon containing material to pressure at a predetermined temperature; cooling said conductive substrate with said material having carbon under pressure to obtain a gas diffusion layer on said conductive substrate; coating a layer of catalyst containing material onto said gas diffusion layer; subjecting said layer of catalyst containing material with gas diffusion layer and conductive substrate to pressure at another predetermined temperature; cooling under pressure to form a gas diffusion electrode. Compared with the existing technologies, all layers within the membrane electrode assemblies are bonded together tightly and will not separate easily. In addition, during fabrication, the gas diffusion electrodes are not easily distorted. These fabrication methods are simple, easy to implement, have good reproducibility and produces electron membrane with excellent synthetic electrical properties.

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First Claim