| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve an interface bonding capability between a catalyst layer and a water repellent layer with respect to an electrolyte membrane/membrane electrode assembly (MEA). <P>SOLUTION: A polymer electrolyte membrane 10 is sandwiched by catalyst layers 12, 16. Water-repellent layers 14 are formed on the surface of the catalyst layer 12, the surface coming in contact with the polymer electrolyte membrane 10, and on the surface of the opposite side thereof. Further, diffusion layers 18 are formed on the surface of the catalyst layer 16, the surface coming in contact with the electrolyte membrane 10 and on the surface on the opposite side thereof. The conductive powder that constitutes the water-repellent layers 14 is produced by means of a spray-dry method, while it is applied on the catalyst layer 12, which is subjected to thermo-compression bonding thereafter so as to form a water-repellent layer 14. The mean particle diameters of both the catalyst layer 12 and water-repellent layer 14 are set to 1 to 20 μm and 1 to 10 μm, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT |
