Fuel cell electrode, method for producing fuel cell...

H - Electricity – 01 – M

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H01M 4/86 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2639636

Disclosed is a fuel cell electrode which is characterized in that a binder layer (buffer layer) containing a thickening agent is formed on a gas diffusion layer, and an electrode catalyst layer containing catalyst particles and a polymer electrolyte is arranged on the binder layer (buffer layer). This fuel cell electrode is increased in adhesion between the gas diffusion layer made of carbon paper or carbon cloth and the electrode catalyst layer, and is thus free from separation of or cracks in the electrode catalyst layer. Also disclosed are a membrane-electrode assembly (MEA) comprising the fuel cell electrode, and a solid polymer fuel cell comprising such a membrane-electrode assembly.

La présente invention concerne une électrode de pile à combustible qui se caractérise en ce qu'une couche de liant (couche tampon) contenant un agent épaississant est formée sur une couche de diffusion de gaz, et une couche catalytique d'électrode contenant des particules catalytiques et un électrolyte polymère est disposée sur la couche de liant (couche tampon). Dans cette électrode de pile à combustible, on augmente l'adhérence entre la couche de diffusion de gaz faite de papier carbone ou de fibre de carbone et la couche catalytique d'électrode, ce qui permet d'éviter la séparation de la couche catalytique d'électrode ou la formation de craquelures dans celle-ci. L'invention a également pour objet un ensemble membrane-électrode (MEA) comprenant l'électrode de pile à combustible, et une pile à combustible à polymère solide comprenant un ensemble membrane-électrode de ce type.

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