Sodium-sulphur cell, method of operating same and method of load

Details Sodium-sulphur cell, method of operating same and method of load Sodium-sulphur cell, method of operating same and method of load

1989-06-30

1990-06-26

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Fluid active material or two-fluid electrolyte combination...

Active material in molten state

H01M 1039

Patent

active

049371550

ABSTRACT:
In a sodium-sulphur cell, liquid sodium is anodic reactant, sulphur and sodium polysulphide are cathodic reactants and sodium ions are conducted by a solid electrolyte. To increase cell capacity and improve safety, a storage region for cathodic reactants is provided away from said solid electrolyte and containing said cathodic reactants in the form of two contacting layers of immiscible liquids formed by gravitational separation. Liquid sulphur being stored does not contact the solid electrolyte. The sodium may also be stored out of contact with the electrolyte. Capillary-action means for feeding the sodium polysulphide from the two liquid layers to the cathode reaction, and for feeding sodium to the anode reaction are included.

REFERENCES:
patent: 3951689 (1976-04-01), Ludwig
patent: 4029858 (1977-06-01), Evans et al.
patent: 4076903 (1978-02-01), Sudworth et al.
patent: 4104448 (1978-08-01), Gibson et al.

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