| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a membrane/electrode joint body for a solid polymer electrolyte type fuel cell preventing membrane crush at the end part of a catalyst layer and suppressing deformation and rupture of an electrolyte membrane based on the repeated change of temperature and humidity generated at the end part of the catalyst layer. <P>SOLUTION: The method of manufacturing a membrane/electrode joint body includes a process (1) for forming the catalyst layer of two layers which are a first catalyst layer 2 and a second catalyst layer 3 relatively smaller in grain size than the first catalyst layer, applying the first catalyst layer onto a gas diffusion layer, applying the second catalyst layer on top of the first catalyst layer after the first catalyst layer is dried, then drying it, and at this time, forming the second catalyst layer also on the outside of the outer periphery of the first catalyst layer, wherein the outside second catalyst layer is formed thinner than the thickness of the whole catalyst layer; and a process (2) for disposing a periphery reinforcing resin film 5 in frame shape, and filling the electrolyte membrane between the outside second catalyst layer and the periphery reinforcing resin film when carrying out thermocompression bonding of both electrodes from both sides of the electrolyte membrane 4, to form an overlap part of the outside second catalyst layer and electrolyte membrane. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
