Chemistry: electrical current producing apparatus – product – and – Fluid active material or two-fluid electrolyte combination... – Active material in molten state
Patent
1976-01-30
1976-11-23
Mack, John H.
Chemistry: electrical current producing apparatus, product, and
Fluid active material or two-fluid electrolyte combination...
Active material in molten state
429188, H01M 1000
Patent
active
039935035
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 (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 and (2) an electrode which is at least partially filled with said cathodic reactant; and (C) a cation-permeable barrier to mass liquid transfer interposed between and in contact with said anodic and cathodic reaction zones, said electrode being in electrical contact with both said cation-permeable barrier and an external circuit. The improvement comprises a composite electrode comprising (a) at least one first portion of porous conductive material which is more readily wet by molten polysulfide than by molten sulfur and (b) at least one second portion of porous conductive material which is more readily wet by molten sulfur than by molten polysulfide.
REFERENCES:
patent: 3883367 (1975-05-01), Chiku et al.
patent: 3922176 (1975-11-01), Robinson et al.
patent: 3932195 (1976-01-01), Evans et al.
Ford Motor Company
Lefevour C. F.
Mack John H.
May Roger L.
Zerschling Keith L.
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