| CPC H01M 8/1004 (2013.01) [H01M 8/0273 (2013.01); H01M 8/04149 (2013.01)] | 7 Claims |
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1. A fuel cell unit cell comprising a membrane electrode assembly and a support frame bonded together by a hot-melt adhesive layer, wherein:
the membrane electrode assembly comprises an electrolyte membrane, a first electrode catalyst layer stacked on a first side of the electrolyte membrane, and a second electrode catalyst layer stacked on a second side of the electrolyte membrane,
the first electrode catalyst layer is stacked inside an outer peripheral side of the electrolyte membrane, and the hot-melt adhesive layer bonds together the outer peripheral sides of the electrolyte membrane and the support frame,
the support frame is disposed in a region separate from the membrane electrode assembly and at the outer periphery of the membrane electrode assembly, and the membrane electrode assembly does not face toward the support frame in a stacking direction of the membrane electrode assembly, and
the hot-melt adhesive layer comprises an ethylene-vinyl alcohol copolymer with an ethylene-derived unit content of 90 to 99 mol %, or a polyamide in which the main chain has 8 to 15 methylene groups for each amide group, or a mixture of the two.
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