FUEL BATTERY

摘要

A fuel battery in which gas not relating to the reaction does not locally stagnate in the fuel battery. A gas diffusion layer is formed on a membrane-electrode assembly fabricated by alternatingly forming an electrolyte membrane and an electrode catalyst layer. A separator having a gas passage is provided in contact with the gas diffusion layer. A gas distribution passage for passing the gas supplied to the membrane-electrode assembly is formed in the separator. The end of the gas passage on the upstream side communicates with the gas distribution passage, whereas the end of the gas passage on the downstream side is substantially closed. The portion of the gas passage on the downstream side is adjacent to that on the upstream side.