Polymer fuel cell structure with improved gas distribution...

Details Polymer fuel cell structure with improved gas distribution... Polymer fuel cell structure with improved gas distribution...

H - Electricity

01

M

H01M 8/02 (2006.01) H01M 8/04 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2412180

The invention discloses a polymer electrolyte fuel cell structure comprising a proton exchange membrane (4). An anode catalyst layer (1; 16) is located on one side of the proton exchange membrane. A cathode catalyst layer (7) is located on the opposite side of the proton exchange membrane, and a gas distribution layer (3, 5) is arranged on each side of the proton exchange membrane (4). The anode side gas distribution layer (3) is a flat, porous structure having water channels (3a) formed in the surface facing the membrane (4). The anode side gas distribution layer (3) is enclosed by a coplanar, sealing plate (2) with water inlet channels coupled to said water channels (3a) in the gas distribution layer.

L'invention concerne une structure de pile à combustible à électrolyte polymère comprenant une membrane (4) échangeuse de protons. Une couche de catalyseur anodique (1, 16) est placée sur un côté de ladite membrane. Une couche de catalyseur cathodique (7) est placée sur le côté opposé de ladite membrane et une couche de distribution de gaz (3, 5) est disposée sur chaque côté de la membrane (4) échangeuse de protons. La couche de distribution de gaz du côté de l'anode (3), qui présente une structure poreuse plate à voies d'eau (3a) formées dans la surface regardant la membrane (4), est enveloppée par une plaque d'étanchéité coplanaire (2) à voies d'arrivée d'eau qui épousent lesdites voies d'eau dans la couche de distribution de gaz.

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