Solid polymer type fuel cell and method for manufacturing the same

A method for manufacturing a solid polymer type fuel cell which comprises producing an electrode by coating on one side of a gas-diffusible layer a noble catalyst-containing dispersion, said catalyst-containing dispersion being prepared by mixing a carbon powder supporting said noble metal catalyst with a colloidal dispersion produced by mixing one or more organic solvents, having a dielectric constant of 3-10, with an alcoholic solution of a solid polymer electrolyte, and pressing the thus produced electrode onto at least one side of a solid polymer electrolyte membrane to integrate them.

A solid polymer electrolyte membrane and electrode assembly, wherein the electrode is produced by a method comprising:

• coating on one side of a gas-diffusable layer a noble catalyst-containing dispersion, said catalyst-containing dispersion being prepared by mixing a carbon powder supporting said noble metal catalyst with a colloidal dispersion produced by mixing one or more organic solvents, having a dielectric constant of 3-10, with an alcoholic solution of a solid polymer electrolyte, pressing the thus produced electrode onto at least one side of a solid polymer electrolyte membrane.

A solid polymer type fuel cell comprising a solid polymer electrolyte membrane, and electrodes provided on both sides of the membrane;

• at least one of said electrodes comprising a gas-diffusible layer and a layer being formed by coating on one side of said gas diffusible layer a dispersion containing a noble metal catalyst prepared by mixing carbon powder to which said noble metal catalyst has been supported with a colloidal dispersion produced by mixing an organic solvent, having a polar group other than hydroxyl group and having a carbon chain of 1 to 8 carbon atoms which bonds to the polar group, with an alcoholic solution of a solid polymer electrolyte, and pressing the thus produced electrode onto said one side of said gas diffusible layer.