| 摘要 |
PURPOSE:To improve reliability by providing substrate water absorption sections, substrate water repellence sections, water collection sections, wicks and traps on an electrode substrate, and properly feeding or discharging water to or from a solid polymer electrolyte film. CONSTITUTION:An ion exchange film 1 made of a solid polymer electrolyte film is a cation exchange film and saturatingly absorbs water to indicate proton conductivity, and an anode 2 and a cathode 3 are arranged on both sides of a principal plane. Flat faces of an electrode substrate are brought into contact with the anode 2 and the cathode 3 respectively, substrate water absorption sections 5 are formed at projections, substrate water repellence sections 6 are formed at the bottom sections of recesses, and gas passages 7 are formed at the recesses. Water collection sections 8 are brought into contact with the water absorption sections 5, and the excess water of a cell is sent to traps 10 via the wicks 9 and accumulated. High-temperature saturated humidified fuel gas and oxidizer gas are fed from the cell to electrodes through anode and cathode gas inlets 13, 11 via the passages 7 and water repellence sections 6. The passages 7 are not clogged, water is properly fed to or discharged from the film 1, and reliability can be improved. |
