Fuel cell having fuel and oxidation gas channels of...

H - Electricity – 01 – M

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H01M 8/02 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2575016

A fuel cell includes a membrane electrode assembly (101); a first gas diffusion layer (104) having a first raised portion (104a); an anode side separator (102); a second gas diffusion layer (105) having a second raised portion (105a); and a cathode side separator (103). A fuel gas passage (102b) formed by a first groove (102a) and the first raised portion (104a) has a first cross section (A1), while an oxidation gas passage (103b) formed by a second groove (103a) and the second raised portion (105a) has a second cross section (A2). The first raised portion (104a) and the second raised portion (105a) are different from each other in scale, forming the first cross section (A1) and the second cross section (A2) different from each other.

La présente invention se rapporte à une pile à combustible, qui comprend : un ensemble électrode à membrane (101) ; une première couche de diffusion de gaz (104) possédant une première partie surélevée (104a) ; un séparateur de côté anode (102) ; une seconde couche de diffusion de gaz (105) possédant une seconde partie surélevée (105a) ; et un séparateur de côté cathode (103). Un passage de gaz combustible (102) formé par une première rainure (102a) et par la première partie surélevée (104a) possède une première section transversale (A1), tandis qu'un passage de gaz d'oxydation (103b) formé par une seconde rainure (103a) et par la seconde partie surélevée (105a) possède une seconde section transversale (A2). La première partie surélevée (104a) et la seconde partie surélevée (105a) ont des dimensions différentes, ce qui forme des première (A1) et seconde (A2) sections transversales différentes.

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