| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cell enhancing output characteristics by suitably exhausting water generated in a cathode catalyst layer attendant on progress of cell reaction and returning part of water to an anode catalyst layer side. SOLUTION: The fuel cell is equipped with the cathode catalyst layer 2, the anode catalyst layer 3, a proton conductive membrane 6 installed between the cathode catalyst layer 2 and the anode catalyst layer 3, a liquid fuel tank 9 for storing liquid fuel L, a fuel vaporizing layer 10 for supplying vaporized component of the liquid fuel L to the anode catalyst layer 3, a surface layer 15 having an air introduction port 14, and a moisture retention plate 13A positioned between the surface layer 15 and the cathode catalyst layer 2 and inhibiting evaporation of water generated in the cathode catalyst layer 2, and the moisture retention plate 13A comprises a stack of at least two kinds of porous bodies 13a, 13b having different moisture permeability (moisture retention). COPYRIGHT: (C)2007,JPO&INPIT
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