Proton exchange fuel cell

Details Proton exchange fuel cell Proton exchange fuel cell

C - Chemistry, Metallurgy

08

J

C08J 5/22 (2006.01) B01D 67/00 (2006.01) B01D 71/00 (2006.01) H01M 8/00 (2006.01)

Patent

CA 2591671

A proton exchange membrane fuel cell (100) comprises at least one membrane- electrode assembly including an electrolyte membrane (102) based on a fluorine free polymer grafted with side chains containing proton conductive functional groups, and interposed between an anode (101) and a cathode (103), the anode (101) including a catalytic layer comprising a catalyst and a fluorinated ionomer. The catalytic layer has a fluorine/catalyst ratio that increases in a direction from the electrolyte membrane (102) to an outer surface of the anode (101).

Une pile à combustible échangeuse de protons (100) comprend au moins un ensemble membrane-électrode pourvu d'une membrane électrolytique (102) composée de polymère non fluoré greffé de chaînes latérales possédant des groupes fonctionnels conducteurs protoniques, et placée entre une anode (101) et une cathode (103); l'anode (101) comportant une couche catalytique qui renferme un catalyseur et un ionomère fluoré. Par ailleurs, la couche catalytique présente un rapport fluor/catalyseur qui augmente dans la direction allant de la membrane électrolytique (102) à une surface extérieure de l'anode (101).

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