Fuel cell

Abstract

An electrode structureis received in a joint portion of frames. A first gas diffusion layerand a first gas passage forming memberare arranged on a first surface of the electrode structure. A second gas diffusion layerand a second gas passage forming memberare formed on a second surface of the electrode structure. A separatoris joined with a surface of the frameand a surface of the gas passage forming member. A separatoris joined with a surface of the frameand a surface of the gas passage forming member. A water passageis formed between a flat plateof the gas passage forming memberand the separator. The water passagehas a depth set to a value smaller than depth of a gas passage Tof the gas passage forming member. Generated water is introduced from the gas passage Tof the gas passage forming memberto the water passagethrough capillary action via communication holes. The generated water in the water passageis moved to a downstream side of the water passageby pressure caused by oxidization gas. This prevents corrosion of the cathode side electrode catalyst layer and improves durability of the anode side gas passage forming member. As a result, a fuel cell capable of preventing decrease of power generation is provided.