Patent ID: 6218034
Filing Date: 2001-04-17
Classification: H01M,H02J,Y02E,Y10T

Abstract:
A cathode cylinder for use in a metal-air fuel cell battery system, said cathode cylinder comprising:a cathode structure of cylindrical geometry having a hollow central core, an outer surface, and a constitution allowing oxygen to flow through said outer surface along said cathode structure towards an ionically-conductive medium in contact with said outer surface during operation of said metal-air fuel cell battery system;an axis of rotation about which said cathode structure rotates during operation of said metal-air fuel cell battery system, andsaid cathode structure further embodyinga catalytic material for supporting a catalytic reaction at the interface formed between said ionically-conductive medium and said outer surface as said metal-fuel material is transported over said ionically-conductive medium in contact with said outer surface during operation of said metal-air fuel cell battery system, anda current-collecting material for collecting electrical current produced as said metal-fuel material is transported over said ionically-conductive medium in contact with said outer surface during operation of said metal-air fuel cell battery system,wherein said ionically-conductive medium comprises a solid-state film having a gelatinous consistency and ionically-conductive properties, applied to said outer surface of said cathode structure.