| 摘要 |
An electrolyte membrane having recesses and projections in the surface is obtained. Also obtained is a membrane-electrode assembly comprising such an electrolyte membrane, wherein the contact area between the electrolyte membrane and an electrode catalyst layer is increased. Specifically, recesses and projections (2a, 2b) are formed in the surface of an electrolyte membrane (1) composed of a fluorine-based electrolyte by heating and pressing the electrolyte membrane (1) using plates (10a, 10b) each having a corrugated surface (11). After the formation, the electrolyte membrane (1) is subjected to a treatment for imparting an electrolyte polymer with ion exchange properties through hydrolysis or the like, thereby being formed into an electrolyte membrane (3) having recesses and projections in the surface. By respectively arranging electrode catalyst layers (21a, 21b) on both sides of the electrolyte membrane, there can be obtained a membrane-electrode assembly (20). |
