| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cell having the optimum fluororesin quantity in a gas diffusion layer comprising a base skeleton of carbon fibers by reconsidering a conventional fixed idea relating to the fluororesin quantity in the gas diffusion layer of the fuel cell. SOLUTION: A fuel cell has an anode 4A and/or a cathode 4C comprising gas diffusion layers 3A, 3C of carbon paper to which water repellency treatment with fluororesin is not performed, or to which water repellency treatment with fluororesin by 30wt.% or less is performed, and reaction layers 2A, 2C. Even with the gas diffusion layer provided with water repellency treatment with fluororesin by 30wt.% below, which his conventionally been considered as improper, almost no flooding is generated, and because a porosity is improved, supply/ discharge gas communication is smoothed, thereby operation at a high current density is enabled. |
