HIGH ENERGY SYSTEM (ORGANIC ELECTROLYTE)
Final rept., 15 Jun 1966-14 Jun 1967
ESB INC YARDLEY PA
Pagination or Media Count:
The major goal of this work was to improve the activated storage life and discharge rate capability of the LiCuF2 cell described in AD-639 704. In addition, the scope was extended to include investigation of new cathode material and electrolytes. The most promising new solvents appeared to be propylene glycol sulfite and diethyl sulfite. A reduction of more than an order of magnitude, in the solubility of CuF2 in LiClO4P. C. solution, was effected by purification of LiClO4 diethyl ether according to the method of Berglund and Sillen. A study of LiCuF2 cells with cathodes containing purified graphite then revealed that activated storage of cells was improved, but at the expense of high cathode polarization. A program of separator and ion exchange membrane evaluation revealed that conventional microporous separators were incapable of preventing the transfer of soluble copper species and subsequent galvanic deposition of copper on the Li anode and resultant cell failure on activated storage. The results of kinetic studies of the CuF2 cathode discharge mechanism appear to indicate that the reaction is diffusion controlled.
- Electrochemical Energy Storage