Fuel cell

摘要

An electrolyte membrane 22 constituting a membrane electrode assembly includes thick portions 23 having a relatively large thickness. The thick portions 23 have a strip shape and are disposed at a predetermined distance from each other along the electric conduction direction. The thick portions 23 extend from one side L1 of the electrolyte membrane 22 extending in a direction perpendicular to the electric conduction direction to the other side L2 of the electrolyte membrane 22 extending in the direction perpendicular to the electric conduction direction. The thick portions 23 have a convex shape with respect to the anode side surface and the cathode side surface of the electrolyte membrane 22.

主权项

1. A fuel cell comprising:
a membrane electrode assembly which includes an electrolyte membrane, an anode provided on one surface of the electrolyte membrane, and a cathode provided on another surface of the electrolyte membrane; and a current-collecting portion provided on a periphery of the membrane electrode assembly, wherein: the electrolyte membrane includes thick portions each having a relatively large thickness, and cracks formed in at least one of the anode and the cathode, and the sum of lengths of components of individual cracks in an electric conduction direction which is toward the current-collecting portion and is an in-plane direction of the electrolyte membrane is larger than the sum of lengths of components of individual cracks in a direction perpendicular to the electric conduction direction.