| 摘要 |
1,263,529. Electric cells. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 11 April, 1969 [12 April, 1968], No. 18769/69. Heading H1B. [Also in Division C1] The active material for a positive electrode consists of solid fluorinated carbon (CFx) n where n is an integer and x ranges from 0À5 to 1, obtained by fluorination of at least one form of crystalline carbon such as artificial graphite and/or flake graphite. The electrode can be used in a cell having a light metal anode, e.g. Li, Na or Al and a non-aqueous electrolyte, e.g. LiClO 4 in propylene carbonate. A sheet of non- woven polypropylene fabric can be used as separator and the cell is assembled and sealed in an atmosphere of dry argon. The positive electrode can be made by mixing the fluorinated carbon material with a binder, e.g. polyethylene or polyethylene tetrafluoride, and an electrically conductive agent, e.g. acetylene black, and moulding the mixture about a central metal screen such as a nickel screen, and then sintering. An organic solvent-type binder such as styrol-benzene or a water soluble binder such as carboxymethyl cellulose can also be used and after a paste electrode is formed the solvent can be removed by heating. |
