H - Electricity – 01 – M
Patent
H - Electricity
01
M
319/32
H01M 10/39 (2006.01)
Patent
CA 1073525
ABSTRACT OF THE DISCLOSURE An improved secondary battery or cell of the type having: (A) one or more anodic reaction zones containing a molten alkali metal reactant-anode in electrical contact with an external circuit, (B) one or more cathodic reaction zones containing (1) a cathodic reactant which, when said battery or cell is at least partially discharged, is selected from the group consisting of (i) a single phase composition comprising molten polysulfide salts of said anodic reactant and (ii) a two phase composition comprising molten sulfur and molten sulfur saturated polysulfide salts of said anodic reactant; (C) a cation-permeable barrier to mass liquid transfer interposed between and in contact with said anodic and cathodic reaction zones; and (D) electrode means within said cathodic reaction zone for transporting electrons to the vicinity of said cation-permeable barrier during discharge of said battery or cell and for transporting electrons away from the vicinity of said cation-permeable barrier during charge of said battery or cell, said electrode means being in electrical contact with both said cation-permeable barrier and said external circuit and being immersed, at least in part, in said cathodic reactant. The improvement of the invention comprises an electrode means which comprises first and second electrodes, the first electrode being (i) adapted to be used in charging the battery or cell, (ii) disposed in a first region of the cathodic reaction zone, (iii) contiguous with or adjacent to a first section of the cation-permeable barrier and (iv) formed of a conductive material which is more readily wet by molten polysulfide than by molten sulfur, and the second electrode being (1) adapted to be used in discharging the battery or cell, - 1 - (ii) disposed in a second region of the cathodic reaction zone, (iii) contiguous with or adjacent to a second portion of the cation-permeable barrier and (iv) formed of a material which is more readily wettable by molten sulfur than by molten polysulfide.
263565
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