| 摘要 |
Disclosed is a sealing structure of a fuel cell, including a film-electrode composite (10) interposed between a first gasket (30) integrated with a separator (20A) and a second gasket (40), capable of ensuring stable sealing performance and stabilizing power generation performance in a power generation range even when an offset exists between the gaskets (30, 40) at either side of the film-electrode composite (10) due to poor assembling accuracy. To this end, the first gasket (30) has a bank-shaped main lip (32) of which top portion (32a) is brought into close contact with the film-electrode composite (10). The second gasket (40) has a flat sealing portion (42) and a sub lip (43) protruding from this flat sealing portion (42) at a position opposing the main lip (32), and the flat sealing portion and the sub lip are brought into close contact with the film-electrode composite (10). The width (w1) of the top portion (32a) of the main lip (32) is larger than the estimated maximum offset, is smaller than the width (w2) of the flat sealing portion (42), and is larger than the width (w3) of the sub lip (43). |
