| 摘要 |
Provided is a fuel cell, comprising: a membrane-electrode assembly (M) further comprising a catalytic layer (6) on both sides of an electrolyte membrane (1) and having three or more porous body layers on the surface side thereof; a frame body (4) which encloses the outer circumference of the electrolyte membrane (1); and a separator (5) which forms gas channels (G) together with the membrane-electrode assembly (M). Of the three porous body layers, a first porous body (11) adjacent to the separator (5) and a second porous body (12) adjacent to the first porous part (11) have extended parts (11A, 12A) disposed on the respective outer edge parts thereof, and the extended parts (11A, 12A) are inserted between the frame body (4) and the separator (5). Thus, excess surface pressure is prevented from being exerted between the extended part (11A) of the first porous body (11) and the frame body (4), and the surface pressure which is applied to the power generation region of the membrane-electrode assembly (M) (the region in which the catalytic layer (6) is formed) is made appropriate. |
