METAL SEPARATORS FOR FUEL CELL AND METHOD OF MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide inexpensive metal separators for a fuel cell which are capable of sufficiently suppressing an increase in contact resistance and use a smaller amount of noble metal such as gold than conventional ones.SOLUTION: A first separator 14 and a second separator 16 as the me...

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Hauptverfasser:	UTSUNOMIYA MASAO, OTANI TERUYUKI, INOUE MASAJIRO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide inexpensive metal separators for a fuel cell which are capable of sufficiently suppressing an increase in contact resistance and use a smaller amount of noble metal such as gold than conventional ones.SOLUTION: A first separator 14 and a second separator 16 as the metal separators for a fuel cell are laminated on a membrane electrode structure 12 in which a cathode electrode 122 and an anode electrode 124 are provided on both sides of a solid polymer electrolyte membrane 120. The first separator 14 and the second separator 16 are characterized in that: they are molded in a corrugated plate shape having irregularities; a noble metal thin film 147 having a dot pattern with a flat surface is formed on protrusions 144, 145, 164, and 165 of the separators; and each dot of the noble metal thin film 147 is composed of a base part 148, in which an outer peripheral portion 148b is thicker than a central portion 148a and a recess 148c is formed at the central portion 148a, and a filling part 149 filling the recess 148c and having a flat surface 149a.