Patent ID: 7709123
Filing Date: 2010-05-04
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A film electrode assembly for a fuel cell comprising: a main body portion of the film electrode assembly having a polymer electrolyte film and a pair of electrode layers, each pair of electrode layers being formed in a center area inside a peripheral edge portion of each of two surfaces of the polymer electrolyte film, each pair of electrode layers having a catalyst layer and a diffusion layer laminated, the diffusion layer having an area larger than that of the catalyst layer with a peripheral edge protruding from the catalyst layer, a gap being formed between the protruding portion of the diffusion layer and the peripheral edge portion of the polymer electrolyte film; a frame member that sandwiches the peripheral edge portion of the polymer electrolyte film with a gap formed between the paired electrode layers, and is made of a plate-shaped thermoplastic resin in such a manner as to surround an outer edge of the polymer electrolyte film; and a gasket formed on each of the two faces of the frame member, the gasket being made of a thermoplastic resin, wherein the gasket includes an annular portion that is placed along an inner edge of the frame member, and covers the gap from the inner edge of the frame member, a rib formed on the annular portion and extending along the inner edge of the frame member, and a gap filling portion for filling the gap between the protruding portion of the diffusion layer and the peripheral edge portion of the polymer electrolyte film.