| 摘要 |
815,094. Batteries. LICENCIA TALALMANYOKAT ERTEKESITO VALLALAT. Sept. 9, 1955 [Sept. 16, 1954], No. 25909/55. Class 53. The shelf life of a primary or secondary cell or battery, other than a lead accumulator, is improved by coating at least one of its components exposed to electrochemical action wholly or in part with a silicone. The component may be a negative electrode, e.g. of Li, Na, K, Mg, Ca, Ba, Sr, Al, La, Zn, Cd, Cr, Ti, Zr, Fe, Mg or an alloy containing at least one of these, or may be the powdered depolarizer or the powdered carbon mixed therewith. As examples: (1) the zinc can of a dry cell is coated with a methyl silicone resin ; (2) the magnesium electrode of a dry cell is coated with a phenyl-methyl silicone resin; (3) the powdered carbon current collector of a layer-type cell is suspended in an ethyl silicone resin; (4) the porous carbon positive electrode of an air-depolarized cell is impregnated a lacquer containing 1 per cent silicone and the solvent is expelled by heating; (5) the depolarizer of a dry cell is made by mixing part of the manganese dioxide powder with 1 per cent by weight of a silicone oil and moulding the resulting powder together with the remainder of the manganese dioxide and the carbon to form the depolarizer. The electrodes of Fe-Ni, Cd-Ni and Ag-Zn storage batteries may also be coated. A siliconecoated negative electrode may be coated with a further layer of a metal oxide, e.g. aluminium oxide, zinc oxide, ferric oxide, titanium dioxide, lead oxide or silicon oxide suspended in a silicone resin or lacquer. |
