SODIUM SULFUR CELL AND PROCESS OF MANUFACTURING THE SAME

摘要

A sodium sulfur cell comprising a cathode active material of metallic sodium, and anode active material of sulfur or sodium polysulfide, and a beta alumina solid electrolyte separator, at least one of the above active materials containing, as an impurity, calcium of at most 20 ppm and/or potassium of at most 200 ppm, by weight. The cell of the invention has excellent characteristics, particularly a prolonged electromotive life.