| 摘要 |
1,064,554. Fuel cells. AMERICAN CYANAMID CO. Dec. 19, 1962 [Dec. 26, 1962; July 1, 1963], No. 3559/66. Divided out of 1,036,513. Heading H1B. [Also in Division D2] An electrode suitable for use in a fuel cell comprises: (a) 20% to 60% of a fibrous support; (b) 1% to 5% of a water-repellent compound; (c) 1% to 25% of a metallic catalyst; and (d) 25% to 50% of an electrically conductive non- catalytic filler, the percentages being by weight of the electrode. The catalyst is a substance that is catalytically active for electrochemical redox reactions. The term "non-catalytic " refers to materials that do not catalyse such reactions. The fibrous support may be an unfused fibrillated paper or a mixture of fibrillated and unfibrillated fibres, and may be of a copolymer of 85% to 90% of acrylonitrile with 10% to 15% of methyl methacrylate or of glass fibres, metal fibres or asbestos and polyvinyl alcohol fibres. The water-repellent compound may be polytetrafluorethylene, a styrene - butadiene copolymer, polyethylene, neoprene or a silicone rubber. The catalyst may be platinum, palladium or ruthenium. The non-catalytic filler may be carbon, titanium, tantalum, zirconium, iron, cobalt, nickel, copper, silver or gold. A composite sheet can be made comprising an inner hydrophilic, non-catalytic, fibrous layer and outer electrode layers by pressing the layers together and drying. These electrodes may be used in fuel cells otherwise similar to those of the parent Specification. |
