| 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 memb rane and an electrode catalyst layer is increased. Specifically, recesses an d projections (2a, 2b) are formed in the surface of an electrolyte membrane (1) composed of a fluorine-based electrolyte by heating and pressing the ele ctrolyte membrane (1) using plates (10a, 10b) each having a corrugated surfa ce (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 me mbrane (3) having recesses and projections in the surface. By respectively a rranging electrode catalyst layers (21a, 21b) on both sides of the electroly te membrane, there can be obtained a membrane-electrode assembly (20).</SDOA B> |
