Patent ID: 8877406
Filing Date: 2014-11-04
Classification: H01M,Y02E,Y02P

Abstract:
1. A fuel cell including a separator and a power generating body, the separator and power generating body being stacked one on top of the other, and the power generating body being equipped at least with an electrolyte membrane, anode and cathode, comprising: a sealing part that seals reaction gas supplied for electrochemical reactions at the fuel cell between the power generating body and the separator at an outer circumference part of the fuel cell, wherein a convex part and a recess are fit together in the sealing part, the convex part being formed projecting in a stacking direction on one of the power generating body and the separator, and the recess being formed recessed in the stacking direction on the other of the power generating body and the separator, and at least one of the convex part and the recess is formed with a polymer material that expands with moisture absorption, wherein the fuel cell has a gap between a projecting tip of the convex part and a recessed bottom surface of the recess in a state for which the at least one of the convex part and the recess formed using the polymer material has expanded due to moisture absorption.