| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell increasing power generation performance by giving uniform and high conductivity and water repellency to a gas diffusion layer. <P>SOLUTION: The fuel cell comprises cells each formed by stacking a conductive water repellent layer, the gas diffusion layer, and a separator on both of a pair of catalyst layers facing through an electrolyte layer in this order. At least one side of the gas diffusion layer is made of a substrate of carbon fibers having carbon-fluorine bond on the surface. By covering the surface of carbon fiber having high conductivity with carbon-fluorine bonds having high water repellency, uniform and high conductivity and water repellency can be kept, and high power generation performance is provided for a long time. <P>COPYRIGHT: (C)2008,JPO&INPIT |
