COMPOSITE MATERIAL, ITS MANUFACTURING METHOD, ELECTRODE FOR SOLID POLYMER TYPE FUEL CELL USING COMPOSITE MATERIAL AND SOLID POLYMER TYPE FUEL CELL

摘要

PROBLEM TO BE SOLVED: To provide a composite material which contains a carbon fiber material having an ideal structure as the carrier of the catalyst layer of a solid polymer type fuel cell and preferably usable in the electrode of the solid polymer type fuel cell.

SOLUTION: The composite material is composed of a conductive substrate and the carbon fiber material arranged on the conductive substrate and the carbon fiber material comprises three-dimensional continuous carbon fiber obtained by the electrolytic polymerization of a compound having an aromatic ring to form a fibril-like polymer and baking the fibril-like polymer. The presence ratio of the carbon fiber material at the region of 15 vol.% from the surface of the composite material is 80-200% with respect the presence ratio of the region of 40 vol.% from the interface with the conductive substrate.

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