Patent ID: 7592085
Filing Date: 2009-09-22
Classification: H01M,Y02E,Y10T

Abstract:
1. A fuel cell comprising; an anode for oxidizing a fuel, a cathode for reducing an oxidizing agent, a polymer electrolyte disposed between the anode and the cathode, an assembly being constituted by the anode, polymer electrolyte and cathode, a pair of gas diffusion layers each disposed at one side of the anode and at one side of the cathode of the assembly, a bipolar plate for providing the fuel to one of the gas diffusion layers, and another bipolar plate for providing the oxidizing agent to the other of the gas diffusion layers, wherein at least one of the gas diffusion layers includes a gas diffusion layer substrate which comprises a plurality of members having spaces therebetween, the spaces forming pores of the gas diffusion layer, and which is subjected to surface treatment with a hydrophilic agent to form a hydrophilic surface layer, and wherein particles of a water-repellent material are dispersed on a surface of the hydrophilic surface layer in the pores.