| 摘要 |
PROBLEM TO BE SOLVED: To provide a membrane electrode assembly for solid polymer fuel cell capable of enhancing power generation efficiency by increasing all of gas channel, proton conduction path, and three-phase interface without increasing a catalyst layer resistance and utilizing effectively the catalyst in the catalyst layer at the time of obtaining a solid polymer fuel cell, and a manufacturing method of the membrane electrode assembly for solid polymer fuel cell.SOLUTION: In the membrane electrode assembly, at least the electrode catalyst layer on the cathode side is composed of a porous film in which a proton conductive polymer obtained by freezing and drying is formed continuously and a catalyst carrying carbon, and the higher the catalyst density in the electrode catalyst layer is, the nearer it is to the polymer electrolyte membrane, while the lower the density is, the farther it is separated from the polymer electrolyte membrane. |
