Method for reducing degradation in a fuel cell

Details Method for reducing degradation in a fuel cell Method for reducing degradation in a fuel cell

H - Electricity

01

M

H01M 8/00 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2596113

The invention is a method of reducing catalyst dissolution in the cathode of a membrane electrode assembly fuel cell, said method comprising the steps of: (a) preparing a membrane electrode assembly comprising an anode, a cathode and a polymer electrolyte membrane interposed between said anode and said cathode; (b) assembling a fuel cell using said membrane electrode assembly; (c) applying a fluid comprising an oxidant to said cathode of said membrane electrode assembly; (d) applying a fluid comprising a fuel to said anode of said membrane electrode assembly; and (e) supplying a sufficient quantity of reducing agent to said cathode to maintain the average open-circuit voltage of said cathode at less than about 0.98 V.

L'invention porte sur un procédé réduisant la dissolution du catalyseur de la cathode d'une pile à combustible à électrodes membranes comportant les étapes suivantes: (a) préparation des éléments des électrodes membranes comportant une anode, une cathode et une membrane d'électrolyte de polymère interposée entre l'anode et la cathode; (b) assemblage desdits éléments de la pile; (c) application à la cathode d'un fluide comprenant un oxydant; (d) application à l'anode d'un fluide comprenant un combustible; et (e) apport d'un agent réducteur en quantité suffisante pour maintenir la tension moyenne en circuit ouvert de la cathode à moins d'environ 0,98V.

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