| 摘要 |
[Problems to be Solved] To provide a membrane electrode assembly where an external leak of a fuel gas and an oxidant gas supplied to a catalyst layer, is suppressed. [Means to Solve the Problems] A membrane electrode assembly includes an electrolyte membrane 30, and frame-shaped first and second gaskets 40, 60 disposed on both surfaces of the electrolyte membrane 30. The first and second gaskets 40, 60 have overlapping portions 42, 62 which are positioned at a peripheral edge 31 of the electrolyte membrane 30 and face to the electrolyte membrane 30, and bonding portions 52, 72 which are positioned outside of the peripheral edge 31 and bonded each other. The overlapping portions 42, 62 and the bonding portions 52, 72 have through holes 48, 68, 58, and 78 which extend in a thickness direction T of the electrolyte membrane 30. An aperture ratio of the through holes 48, 68 of the overlapping portions 42, 62 is greater than an aperture ratio of the through holes 58, 78 of the bonding portions 52, 72. |
