| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell which can be stably operated for a long period of time, since a pressurizing force applied to a membrane electrode assembly of a unit cell is almost uniformly held, and the breakage of an electrolyte membrane caused by a stress concentration is avoided. <P>SOLUTION: In this polymer electrolyte type fuel cell in which the outer surface of the membrane electrode assembly comprising the electrolyte membrane 1 held between protective sheets 4, a diffusion layer 3A, and a catalyst layer 2A is composed of a first plane T2 disposed face to face with a region where the catalyst layer 2A is formed, a second plane T2 lower than the first plane T1, a separator 6A to sandwich the membrane electrode assembly is structured so as to have a third plane S1 making contact with the first plane T1 face to face, and a fourth plane S2 making contact with the second plane T2 face to face while being higher than the third plane S1 in its inner surface. This fuel cell is formed by blasting the surface of a carbon composite material. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
