| 摘要 |
In a conventional fuel battery cell, it is difficult to enhance the durability of a membrane electrode assembly because a bending stress due to a pressure difference between the anode side and the cathode side is concentrated at end portions of the membrane electrode assembly. A fuel battery cell C includes a membrane electrode assembly 2 having a frame 1 in a periphery thereof; two separators 3A, 3B holding them therebetween; and gas seal members 11, 12 provided to peripheral portions of diffuser areas D1, D2 each formed between the frame 1 and one of the separators A, 3B. A diffuser-area-D1-side edge position of the gas seal member 11 in the diffuser area D1 on the cathode side and a diffuser-area-D2-side edge position of the gas seal member 12 in the diffuser area D2 on the anode side are offset from each other in an inside-outside direction of the diffuser areas D1, D2. Thus, a stress occurring due to the gas pressure difference between the cathode side and the anode side is distributed to different sites, and thereby the durability of the frame and the membrane electrode assembly is enhanced. |
