| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an MEA provided with an edge seal, having a simple structure composed by using inexpensive materials, and having a small number of components and being improved in durability. <P>SOLUTION: This membrane-electrode assembly includes an electrolyte membrane 13; a cathode catalyst layer 15b arranged on one side of the electrolyte membrane; an anode catalyst layer 15a arranged on the other side of the electrolyte membrane; and a gasket structure 21 having integrated gasket layer arranged at least in a part of circumferences of ends of both the catalyst layers. The membrane-electrode assembly has gas diffusion layers 17a, b formed on both surfaces of the membrane; the areas of both the gas diffusion layers formed on both the surfaces of the membrane are different from each other; and at least a circumferential part of the membrane on the side, where the area of the gas diffusion layer is smaller, is jointed to the gasket structure. <P>COPYRIGHT: (C)2007,JPO&INPIT |
