| 摘要 |
PROBLEM TO BE SOLVED: To obtain a solid polymer fuel cell which has a superior cell characteristic by suppressing the drying of electrolyte membrane of an entrance side of reaction gas and by suppressing the reduction of gas diffusion performance of a catalyst layer of an exit side. SOLUTION: In the fuel cell which uses an electrolyte/electrode junction 4A constituted by arranging a catalyst layer 2A and a gas diffusion layer 3 for both faces of a solid polymer electrolyte membrane 1, the catalyst layer 2a is constituted from the first catalyst layer 21 of a small pore size and pore volume and from the second catalyst layer 22 of a large pore size and pore volume, and this is constituted so that the first catalyst layer 21 is arranged at the entrance side of the reaction gas, and the second catalyst layer 22 at the exist side. |
