| 摘要 |
1496648 Sodium-sulphur cells ESB Inc 9 June 1976 [9 June 1975] 23798/76 Heading H1B A secondary cell comprises, in the charged state, a molten Na negative reactant, a positive reactant of a molten mixture of S and a mixture of halides of either a metal at least as noble as Al or of a metalloid; the negative and positive reactants each having a current collector disposed therein being separated by a member selectively ionically conductive to Na cations, e.g. beta-alumina the positive reactant side of the member containing a molten sodium haloaluminate and in which the mixture of halides is at least partly soluble in the haloaluminate electrolyte. Preferred halide mixtures comprise aluminium halide with either the halide of Sb, As, Te, or Ti, in particular, AlCl 3 /SbCl 5 and AlBr 3 /SbBr 5 may be used as positive reactant. The electrolyte may be formed from NaCl and AlCl 3 or NaBr and AlBr 3 . A dispersed C powder in the positive reactant may act as the current collector. The cell may be operated between 150‹ and 225‹ C. |
