Development program for solid electrolyte batteries

The results of sodium-sulfur battery program are presented. The long-range objective of the program was the development and commercialization of sodium-sulfur battery for electric utility energy storage. The study demonstrated that the major challenges of developing the sodium-sulfur battery into a commercially viable energy-storage system are: (1) development of corrosion resistant sulfur-electrode containers; (2) design and development of a less highly stressed seal; (3) fabrication of long-life electrolytes; and (4) design of cells capable of full utilization of the active positive-electrode material (sulfur).