| 摘要 |
A membrane electrode assembly includes an solid polymer electrolyte membrane, an anode, and a cathode. The cathode has a stacked body of a catalyst layer and a gas diffusion layer. The catalyst layer has platinum-cobalt-supporting carbon particles and an ion conductor. The ratio (P2/P1) of the pore volume P2 (ml/g) per gram of catalyst layer in a second micro-pore diameter, ranging from 0.1 µm to less than 1 µm, over the pore volume P1 per gram of catalyst layer in a first micro-pore diameter, ranging from 0.01 µm to less than 0.1 µm, is in a range of 3.8 to 8.3. |
