Fuel cell unit and fuel cell

Abstract

There is provided a fuel cell unit including at least: a membrane electrode assembly including an electrolyte membrane and two catalyst layers sandwiching the electrolyte membrane therebetween; two gas diffusion layers sandwiching the membrane electrode assembly therebetween; an oxygen supplying layer brought into contact with one gas diffusion layer of the two gas diffusion layers; two collectors; and a seal portion, in which: the fuel cell unit has side surfaces of which a side surface parallel to a proton conductive direction of the electrolyte membrane has an opening portion provided in a part of the side surface; and a part of the one gas diffusion layer brought into contact with the oxygen supplying layer constitutes a part of an outer surface of the fuel cell unit. The fuel cell unit can enhance drainage efficiency and achieve effective supply of an oxidizer.

Dependencies are inferred from the claim text.