Accession Number : AD0825241

Title :   EVALUATION OF RECHARGEABLE LITHIUM-COPPER CHLORIDE ORGANIC ELECTROLYTE BATTERY SYSTEM.

Descriptive Note : Final rept. Mar-Oct 67,

Corporate Author : MALLORY (P R) AND CO INC BURLINGTON MA LAB FOR PHYSICAL SCIENCE

Personal Author(s) : Dey, A. N. ; Rao, M. L. B.

Report Date : 15 NOV 1967

Pagination or Media Count : 69

Abstract : The Li/CuCl2 organic electrolyte system self discharges rapidly due to the formation of highly soluble chlorocuprate complexes (e.g. CuCl3(-), CuCl2(-), etc.). The feasibility of using ion-exchange membranes as separators to retard the diffusion of chlorocuprate complexes was demonstrated by studying the transference of the counter ions and the self diffusion properties of the counter ions and the co-ions of the membranes in butyrolactone. The transference number of Li(+) through a cation exchange membrane was found to be 0.98, and the diffusive flux of the Li(+) was found to be 10 to 100 times faster than that of CuCl3(-) through the same cation exchange membrane. The various problems associated with the use of ion-exchange membranes as separators in organic electrolyte battery systems were studied. An extensive evaluation was carried out on a variety of commercially available ion-exchange membranes with reference to the Li/CuCl2 system. These studies showed that the self-discharge current density of a Li/CuCl2 cell could be decreased from 0.2 ma/sq cm to 0.1 micro-a/sq cm by the use of an ion-exchange membrane separator. The resistivity of the membranes was found to be one to two orders of magnitude higher than the resistivity of the solutions. (Author)

Descriptors :   (*STORAGE BATTERIES, PERFORMANCE(ENGINEERING)), ANODES(ELECTROLYTIC CELL), LITHIUM, CATHODES(ELECTROLYTIC CELL), COPPER COMPOUNDS, CHLORIDES, ELECTROLYTES, ORGANIC MATERIALS, SOLVENTS, MEMBRANES, ION EXCHANGE RESINS, ELECTROOSMOSIS, COMPATIBILITY, COMPLEX COMPOUNDS.

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE