Tubular fuel cell with thermosetting resin seal portion

H - Electricity – 01 – M

Patent

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Details

H01M 8/10 (2006.01)

Patent

CA 2627926

A tubular fuel cell (10) includes an inner current collector (5), a membrane- electrode assembly (6a), and seal portions (7al, 7a2) provided at the axial end portions of the membrane-electrode assembly, respectively. The membrane- electrode assembly includes an inner catalyst layer (2a) provided on the inner current collector, an electrolyte membrane (1) provided on the inner catalyst layer, and an outer catalyst layer (2b) provided on the electrolyte membrane. The axial length of the outer catalyst layer is shorter than the axial lengths of the electrolyte membrane and the outer catalyst layer. The axial end face of the outer catalyst layer and the axial end face of the inner catalyst layer are located on the opposite sides of the seal portion in each side of the tubular fuel cell.

Selon cette invention, une pile à combustible tubulaire (10) comprend un collecteur de courant interne (5), un ensemble d'électrodes à membrane (6a), et des parties d'étanchéité (7a1, 7a2) situées respectivement au niveau des parties d'extrémité axiale dudit ensemble d'électrodes à membrane. Ce dernier comprend une couche catalytique interne (2a) disposée sur le collecteur de courant interne, une membrane électrolytique (1) disposée sur la couche catalytique interne, et une couche catalytique externe (2b) placée sur la membrane électrolytique. La longueur axiale de la couche catalytique externe est plus petite que les longueurs axiales de la membrane électrolytique et de la couche catalytique externe. La face d'extrémité axiale de la couche catalytique externe et la face d'extrémité axiale de la couche catalytique interne sont situées sur les côtés opposés de la partie d'étanchéité dans chaque côté de la pile à combustible tubulaire.

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