Secondary battery or cell with improved rechargeability

Chemistry: electrical current producing apparatus – product – and – Fluid active material or two-fluid electrolyte combination... – Active material in molten state

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429218, H01M 1039

Patent

active

040911519

ABSTRACT:
An improved secondary battery or cell of the type comprising: (A) an anodic reaction zone containing a molten alkali metal reactant-anode in electrical contact with an external circuit; (B) a cathodic reaction zone containing a cathodic reactant comprising a liquid electrolyte which is electrochemically reactive with said anodic reactant and an electrode of porous conductive material which is at least partially immersed in 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 porous conductive material being in electrical contact with both said cation-permeable barrier and an external circuit. The improvement of the invention comprises employing a cation-permeable barrier having major grooves or channels being devoid of said porous conductive material and being adapted in size and shape such that polysulfide salts within said cathodic reaction zone can flow therein by capillary forces.

REFERENCES:
patent: 3982957 (1976-09-01), Jones et al.
patent: 3993503 (1976-11-01), Ludwig

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