| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell, in which a membrane-electrode assembly is set up to be uniformly wet in the whole cell, for exhibiting a stable power generation characteristic. <P>SOLUTION: The fuel cell 1 includes: a membrane-electrode assembly MEA formed with a solid polymer electrolyte membrane 100 and electrodes; and separators 114, 124 having gas passages 115, 125. The electrodes of the fuel cell 1 have: catalyst layers 110, 120; and diffusion layers 112, 122 formed on the gas passage side. Catalyst-side water-repellent layers 111, 121 are arranged between the diffusion layers 112, 122 and the catalyst layers 110, 120, and the membrane thickness T<SB>111</SB>, T<SB>121</SB>of the catalyst-side water-repellent layers 111, 121 is thinned gradually or step by step from an inlet side to an outlet side of the gas passages 115, 125. Passage-side water-repellent layers 113, 123 are arranged between the diffusion layers 112, 122 and the gas passages 115, 125, and membrane thickness T<SB>113</SB>, T<SB>123</SB>of the passage-side water-repellent layers 113, 123 are thickened gradually or step by step from an inlet side to an outlet side of the gas passages 115, 125. <P>COPYRIGHT: (C)2009,JPO&INPIT |
