| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrolyte membrane/electrode structure including a porous layer which can suppress deterioration or breakage of the electrolyte membrane and increase bondability with an electrode catalyst layer and a gas diffusion layer respectively, thereby increasing productivity and durability.SOLUTION: A porous layer 36, 44 is interposed between electrode catalyst layers 32, 40 of an anode electrode 28 and a cathode electrode 30 and a gas diffusion layer 34, 42. A surface roughness of a diffusion layer contact part 50, 56 of the porous layer 36, 44 contacting with the gas diffusion layer 34, 42 is set to be larger than that of a catalyst layer contact part 52, 58 contacting with the electrode catalyst layer 32, 40, an electrolyte membrane contact part 54a, 60a contacting with an electrolyte membrane 24, and a seal formation part 54b, 60b contacting with an insulation sheet 38, 46. A center line average roughness Ra of the diffusion layer contact part 50, 56 is preferably 3.0-10.0 μm, and the center line average roughness Ra of the catalyst layer contact part 52, 58, the electrolyte membrane contact part 54a, 60a, and the seal formation part 54b, 60b is preferably 1.0 μm or less. |
