| 摘要 |
PROBLEM TO BE SOLVED: To improve electric power generation efficiency by improving the structure of a positive electrode of a fuel cell for efficiently draining formed water excessively generated during high-load operation and a long-term operation, while moisturizing an electrolyte film. SOLUTION: A positive electrode 3 and a negative electrode 4 are arranged with interposing an electrolyte film 2, and oxidization gas is supplier to a gas flow passage 51 of the positive electrode 3 side and fuel gas is supplied to a gas flow passage 61 of the negative electrode 4 side, to generate electric power. The positive electrode 3 includes a hydrophilic base material layer 31 and a water-repellant layer 32 partially formed on the side of the surface of the gas flow passage 51. The water-repellant layer 32 is formed on a surface, excluding the lower part of the base material layer 31 where excessive formation water formed by positive electrode reaction is retained, to accelerate draining of retaining formed water. |
