| 摘要 |
PURPOSE:To prevent the reaction gas from flowing to an oxygen side separator from a hydrogen side separator and preclude risk of combustion. CONSTITUTION:Gas seal structure of a gas diffusion electrode is composed of an oxygen side separator 21 where the first recess 24 for fitting of an oxygen side gas flow-path 22 and the first gas diffusion electrode 23 is formed and which is provided at the periphery with a fit groove 26 for a sealing material, a hydrogen side separator 28 which is provided with the second recess 31 for fitting of a hydrogen side gas flow-path 29 and the second gas diffusion electrode 30, and a solid high-polymer electrolyte film 32 installed between the separators being in contact with the first and second gas diffusion electrodes 23, 30. A water supply flow-path 27 is furnished in the oxygen side separator mating with the first gas diffusion electrode 23 and sealing material, and the space between the first gas diffusion electrode and sealing material is used as a water sump 33. |
