Gas diffusion layer for fuel cell, manufacturing method therefor, membrane electrode assembly, and fuel cell

摘要

A gas diffusion layer for fuel cell of the present invention is structured with a porous member mainly comprised of conductive particles such as acetylene black, graphite and a polymer resin such as PTFE. This makes it possible to achieve both an improvement in power generation performance of the fuel cell and a reduction in costs.

主权项

1. A gas diffusion layer used for a fuel cell, wherein the gas diffusion layer is structured with a porous member whose principal components are conductive particles (excluding conductive particles modified with boron) and a polymer resin, with carbon fibers added by a weight smaller than a weight of the polymer resin, and
the porous member includes the carbon fibers by 2.0 weight percent or more and 7.5 weight percent or less, and includes the polymer resin by 10 weight percent or more and 17 weight percent or less.