Chemistry: electrical current producing apparatus – product – and – Fluid active material or two-fluid electrolyte combination... – Active material in molten state
Patent
1977-02-28
1977-09-13
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Fluid active material or two-fluid electrolyte combination...
Active material in molten state
429109, H01M 1039
Patent
active
040483940
ABSTRACT:
An improved secondary battery or cell of the type having: (A) an anodic reaction zone 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) a current collector which at least partially exposed to said cathodic reactant and which is in electrical contact with both said cation-permeable barrier and said external circuit. The improvement comprises employing in said device a current collector comprising a graphite body bearing a coating of vitreous carbon on at least those surfaces thereof which are exposed to said cathodic reactant.
REFERENCES:
patent: 3854979 (1974-12-01), Rossi
patent: 3982957 (1976-09-01), Jones et al.
patent: 3993503 (1976-11-01), Ludwig
patent: 4011367 (1977-03-01), Evans et al.
Ford Motor Company
May Roger L.
Skapars Anthony
Zerschling Keith L.
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