Efficient sodium/sulfur battery

Details Efficient sodium/sulfur battery Efficient sodium/sulfur battery

1976-08-13

1978-01-24

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

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

Active material in molten state

429191, H01M 1039

Patent

active

040705277

ABSTRACT:
Improved sodium-sulfur batteries are provided by enhancing the utilization of active positive-electrode material. In sodium-sulfur batteries, employing a liquid sodium electrode separated from a liquid sulfur electrode by a solid .beta.-alumina electrolyte separator, where the sulfur is impregnated in an electronically conducting matrix such as porous carbon, enhanced utilization of active electrode material is achieved during the charging-discharging cycling by enhancing the electronic resistivity adjacent the .beta.-alumina in the sulfur electrode. This can be achieved in a variety of ways, particularly employing porous carbon of higher resistivity adjacent the .beta.-alumina as compared to the porous carbon distant from the .beta.-alumina.

REFERENCES:
patent: 3826685 (1974-07-01), Dubin et al.
patent: 3982959 (1976-09-01), Partridge et al.

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