Patent ID: 8790846
Filing Date: 2014-07-29
Classification: H01M,Y02E,Y02P,Y02T

Abstract:
1. A gas diffusion layer used for fuel cell, wherein the gas diffusion layer has a double-layer structure made up of a first diffusion layer and a second diffusion layer, the first diffusion layer having a gas flow passage formed at one main surface of the first diffusion layer, and the second diffusion layer being stacked on an other main surface of the first diffusion layer, the first and second diffusion layers are each structured with a porous member mainly comprised of conductive particles and a polymer resin, with carbon fibers added by a weight smaller than a weight of the polymer resin, the first diffusion layer is lower in a porosity than the second diffusion layer, and the first diffusion layer is higher in a composition ratio of the carbon fibers than the second diffusion layer.