Gas diffusion electrode for polymer electrolyte membrane...

Details Gas diffusion electrode for polymer electrolyte membrane... Gas diffusion electrode for polymer electrolyte membrane...

H - Electricity

01

M

H01M 4/96 (2006.01) C25B 9/10 (2006.01) C25B 11/03 (2006.01) H01M 4/86 (2006.01) H01M 4/88 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2238945

A particularly inexpensive, light, homogeneous and porous gas diffusion electrode (1, 1') for polymer electrolyte membrane fuel cells is produced as follows: carbonised carbon fibre nonwoven fabric (3, 3') is coated with a mixture of a soot suspension and a polytetrafluoroethylene suspension and then baked. The gas diffusion electrode can be provided with a catalytically active layer (4, 4').

L'invention concerne la production d'une électrode de diffusion gazeuse (1, 1') particulièrement économique, légère, homogène et poreuse pour des piles à combustible possédant une membrane en électrolyte polymérique. Selon ce procédé, un non-tissé de fibre de carbone (3, 3') carbonisé est recouvert d'un mélange, composé d'une suspension de suie et d'une suspension de polytétrafluoréthylène, puis fritté. L'électrode de diffusion gazeuse peut être dotée d'une couche catalytiquement active (4, 4').

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