Chemistry: electrical current producing apparatus – product – and – Fluid active material or two-fluid electrolyte combination... – Active material in molten state
Patent
1977-03-22
1978-04-11
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Fluid active material or two-fluid electrolyte combination...
Active material in molten state
H01M 1039
Patent
active
040840417
ABSTRACT:
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 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) an electrode which is disposed within said cathodic reaction zone such that it is (i) at least partially immersed in said cathodic reactant, and (ii) in electrical contact with both said cation-permeable barrier and said external circuit. The improvement comprises employing an electrode, at least a portion of which consists essentially of a carbon based porous conductive material which (i) is coated with a material which renders the electrode portion more readily wettable by molten polysulfide than by molten sulfur, (ii) does not fill the entire volume of said cathodic reaction zone, and (iii) is, at least in part, adjacent to and contiguous with said cation-permeable barrier.
REFERENCES:
patent: 3811943 (1974-05-01), Minck et al.
patent: 3980496 (1976-09-01), Ludwig et al.
patent: 4024320 (1977-05-01), Gibson et al.
Ford Motor Company
May Roger L.
Skapars Anthony
Zerschling Keith L.
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