| abstract |
The present invention provides a fuel cell comprising a pair of separators (3,4)nsandwiching outsides of a membrane electrode assembly (2) composed of a pair ofnelectrodes provided on both sides of a solid polymer electrolyte membrane, an outernseal member (5) sandwiched by a pair of separators at a position surrounding an outernperiphery of the membrane electrode assembly, an inner seal member (6) sandwiched bynone of the pair of separators and an outer periphery of the electrolyte membrane, and anbacking member opposing to the inner seal member interposing the electrolytenmembrane, wherein steps are formed at contact surfaces of the inner seal member andnthe outer seal member on one of the pair of separators. |