Patent ID: 9088015
Filing Date: 2015-07-21
Classification: H01M,Y02E

Abstract:
1. A fuel cell formed by stacking a membrane electrode assembly and a metal separator together horizontally in a stacking direction, the membrane electrode assembly includes a pair of electrodes and an electrolyte membrane interposed between the electrodes, the electrodes each having an electrode surface provided vertically along a direction of gravity, the electrode surface having a shape elongated in a horizontal direction which is orthogonal to the stacking direction of the metal separator, a reactant gas flow field being provided in the electrode surface for allowing an oxygen-containing gas or a fuel gas as a reactant gas to flow along the electrode surface in a longitudinal direction thereof; wherein a water discharge channel is provided at a lower end of the reactant gas flow field in the direction of gravity for discharging water produced in power generation reaction downward in the direction of gravity; and the water discharge channel is formed by a corrugated section including a protrusion and a recess formed alternately on a surface of the metal separator where the reactant gas flow field is provided, the water discharge passage extending on the surface in a direction which intersects the longitudinal direction in which the reactant gas flow field extends.