| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polymer electrolyte fuel cell capable of exhibiting a stable performance even at a high current density, and a gas diffusion layer electrode base material suited for obtaining the same, as well as its manufacturing method. <P>SOLUTION: The gas diffusion layer electrode base material for the polymer electrolyte fuel cell having a carbon fiber paper is provided with a plurality of through-holes penetrating from one face to the other, with densities and/or pore sizes made different in a plane direction. In the manufacturing method of the gas diffusion layer electrode base material for the polymer electrolyte fuel cell, a paper-shaped body including carbon short fiber is impregnated with carbon precursor resin to harden it, through-holes with different densities and/or pore sizes in the plane direction are opened on it, and later, it is carbonized. In the polymer electrolyte fuel cell provided with a fuel electrode side gas diffusion layer electrode base material, a fuel electrode side catalyst layer, a polymer electrolyte film, an oxygen electrode side catalyst layer, and an oxygen electrode side gas diffusion layer electrode base material, the oxygen electrode side gas diffusion layer base material has a plurality of through-holes penetrating from one face to the other with the densities and/or the pore sizes made different in plane direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
