GAS DIFFUSION LAYER FOR FUEL CELL

摘要

This gas diffusion layer (30) for a fuel cell is provided with a gas diffusion layer substrate (31) and a microporous layer (32) formed on the gas diffusion layer substrate (31) and containing a particulate carbon material and flake graphite. A belt-shaped region (32a) in which the flake graphite is concentrated is formed in the microporous layer (32) so as to extend in a substantially parallel direction to the joining interface (31a) between the gas diffusion layer substrate (31) and the microporous layer (32). As a result, it is possible to balance the dry-out resistance and flooding resistance of the gas diffusion layer, which are conventionally in a trade-off relationship with one another, and to improve the performance of a solid polymer fuel cell.