Patent ID: 8940450
Filing Date: 2015-01-27
Classification: H01M,Y02E

Abstract:
1. A membrane electrode assembly (MEA), comprising: an electrolyte membrane for a fuel cell; a microporous layer (MPL) that is disposed at a surface of the electrolyte membrane; a backing layer that is disposed on the MPL; and a circumferential edge protective layer disposed at a circumferential edge of the electrolyte membrane, the circumferential edge protective layer being located between the backing layer and the electrolyte membrane, an entire extension of the backing layer along a direction perpendicular to a stacking direction of the MEA being positioned farther inside of the MEA than an entire extension of the electrolyte membrane along the direction perpendicular to the stacking direction of the MEA being positioned farther inside of the MEA, an entire extension of the MPL along the direction perpendicular to the stacking direction of the MEA being positioned farther inside of the MEA than the entire extension of the backing layer along the direction perpendicular to the stacking direction of the MEA.