Cathode cell casing portion, a cell casing, and a hermetically sealed sodium-sulfur cell

摘要

A cathode cell casing portion, a cell casing, and a hermetically sealed sodium-sulfur cell are disclosed. The metallic cathode cell casing portion is made of one of several specific metals with a corrosion resistant and electronically conducting layer adhering to the inner surface of the casing. The cell casing includes the above cathode cell casing portion and an opposed anode cell casing portion joined to a ceramic ring supporting an inner casing of a solid sodium ion-conductive material. A hermetically sealed sodium-sulfur cell has the above type of casing with a sodium negative electrode in the inner casing and a positive electrode of sulfur in conductive material in the cathode casing portion surrounding the inner casing.