Lithium-Inorganic Electrolyte Batteries
Quarterly rept. no. 10, 16 Dec 1975-15 Mar 1976
EIC CORP NEWTON MA
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The purpose of the present program is to study the feasibility of an all-inorganic electrolyte lithium primary battery operable and storable over the temperature range of-40F to 160F. The desired energy density is 150 watt-hours per pound of total battery weight and the desired power density is 50 watts per pound. The program work has centered along two lines the reaction stoichiometry of the cell discharge via chemical analysis of the reaction products, and the problem of LiSOCl2 cell passivation during storage at 71C with a view to finding practical solutions to this problem. Qualitative analyses indicated the presence of LiCl, S and SO2 as reaction products of the cell discharge. Storage of LiSOCl2 cells at elevated temperature and subsequent discharge at room temperature results in large voltage delays and voltage depression. This continues to be a major problem in the utilization of the Li SOCl2 cell. Studies show that the cause of the passivation is the formation of a nonconductive film on the Li anode during storage, especially at elevated temperatures. The authors research efforts have been directed at studying film formation, and modifying the film to improve cell performance.
- Electrochemical Energy Storage