| 摘要 |
PURPOSE:To maintain stable performance of a fuel cell over a long period by using a thermoplastic resin film in each rib electrode so as to prevent its warping. CONSTITUTION:A thermoplastic resin film 4 is heated and pressed into a peripheral region in the end section 2a of the rib electrode 2 of each cell unit to form a gas seal section having an I-shaped cross section. Due to the I-shaped cross section, this gas seal section has minimal stress concentration and therefore warping of the rib electrode 2 is almost prevented as compared to the conventional rib electrode thereby maintaining stable performance over a long period. Since the film 4 does not protrude from the end surface of the electrode base as distinct from the conventional method of directly sealing the end surface, rib electrodes 2 can be easily stacked together. |
