Sodium sulfur cell and process of manufacturing the same.

摘要

A sodium sulfur cell comprises a cathode (5) of metallic sodium, an anode (3) of sulfur or sodium polysulfide, and beta alumina tube solid electrolyte separator (1) containing water in an amount of not more than 0.3 mg per cm<2> of the surface area of the beta alumina tube. This cell has a prolonged electromotive life and maintains reliable characteristics for a long time. The cell can be manufactured by conducting heating to remove water from the beta alumina separator after sintering.