| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell including an electrode body capable of equally applying a prescribed sufficient contact pressure to an electrode surface by improving the composition of a protection film and a catalyst layer. <P>SOLUTION: An electrode body 20 is composed of: a membrane electrode assembly 10 having an electrolyte membrane 1, catalyst layers 2, 2'on an anode side and a cathode side having a smaller flat surface area than that of the electrolyte membrane 1, between which the electrolyte membrane 1 is interposed; a protection film 3 coming in contact with both of the end of electrolyte membrane 1 and the ends of the catalyst layers 2, 2'; and gas diffusion layers 4, 4' on an anode side and a cathode side, between which the membrane electrode assembly 10 and the protection film 3 are interposed. The electrode body 20 is interposed between separators 6, 6 to form a cell 30, and the cells 30 are stacked to form a fuel cell. The protection film 3 is made thinner than the catalyst layers 2, 2' on the electrolyte membrane 1, and the end of the protection film 3 is brought into contact with the ends of the catalyst layers 2, 2' without wrapping. <P>COPYRIGHT: (C)2010,JPO&INPIT |
