GAS DIFFUSION LAYER FOR FUEL CELL

摘要

A gas diffusion layer for a fuel cell includes a conductive microparticle layer and a base material layer. The conductive microparticle layer is formed with first pores of no less than 0.5μm and no more than 50μm and second pores of no less than 0.05μm and less than 0.5μm. Pores are also formed in the base material layer. A total volume of the second pores is no less than 50% and less than 100% of a total volume of all of the pores in the conductive microparticle layer. By properly setting a pore size D1 of pores having a maximum volume ratio from among the first pores, water passages are formed in the first pores separately from gas passages formed in the second pores.