Sodium sulfur battery or cell with external storage

Details Sodium sulfur battery or cell with external storage Sodium sulfur battery or cell with external storage

H - Electricity

01

M

319/32

H01M 10/39 (2006.01)

Patent

CA 1054673

SODIUM SULFUR BATTERY OF CELL WITH EXTERNAL STORAGE 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 comprising a liquid electrolyte which is electrochemically reversibly reactive With said anodic reactant and which, when said battery or cell is at least partially discharged, is selected from the group consisting of (i) a single phase composition com- prising 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 in contact with said liquid electrolyte; 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 of the invention comprises including as a part of said secondary battery or cell (A) one or more storage zones for said liquid electrolyte which are separate from said one or more cathodic reaction zones and (B) means for flowing said liquid electrolyte from at least one of said storage zones, through said one or more cathodic reaction zones and out of said cathodic reaction zones to at least one of said storage zones. More particularly, the improvement comprises the use of such storage zones and means for flowing in combi- nation with several preferred types of battery or cell design. - 1 -

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