| 摘要 |
1,175,995. Metal/sulphur cell having an organic electrolyte. MALLORY BATTERIES Ltd. 8 March, 1967 [23 March, 1966], No. 10820/67. Heading H1B. An electric cell comprises an anode of Li, Na, Be, Ca, Mg or Al, a cathode containing sulphur as the active material, and an electrolyte containing a tetrafluoroborate, tetrachloroaluminate, perchlorate or chloride of Na, Be, Ca, Mg, Al, Li or ammonium dissolved in an organic solvent. The anode metal may be amalgamated. The organic solvent contains at least one of propylene carbonate, #-butyrolactone, dimethyl formamide and dimethyl sulphoxide, to which is added at least one of ethylene carbonate, acrylonitrile, and methyl or butyl formate. The sulphur cathode may contain a minor amount, e.g. 5-25 wt. per cent, of an inert conductive additive, e.g. carbon, graphite, tantalum, stainless steel or copper, and soluble matter to increase porosity, and also, e.g. ethylcellulose as a binder and a metal foil, screen or grid as current collector; an example uses 1 : 3 :1 (p.b.w.) of carbon black : sulphur : LiC10 4 . A separator of fibreglass or nylon may be used. The anode, especially when of Mg or Al, may be amalgamated by treating it with a solution of HgCl 2 , Hg(NO 3 ) 2 , Hg(OOC. CH 3 ) 2 , HgClO 4 or Hg(CNS) 2 in DMF, #-butyrolactone or acetone. Fig. 1 shows an embodiment in which 10, 16, 18 are stainless steel casing components, 20 is a grommet (e.g. neoprene, polyethylene), 22 the anode plate (e.g. Li), 24 an electrolyte matrix, e.g. cotton containing 1M LiC10 4 solution, 14 a separator, and 12 the cathode mix. |
