NON-AQUEOUS ELECTROLYTE SYSTEMS.
Abstract
Two potentially useful high energy battery electrolyte solvents, tetramethylene sulfoxide (TMSO) and dimethyl sulfite were characterized. Charging and discharging tests have shown that lithium metal can be deposited and discharged from lithium perchlorate solutions in these solvents with 50 to 90 percent charge efficiency. The discrepancy from 100 percent is apparently due to water contamination. Potasium persulfate, copper fluoride, iodine, and silver chloride all yielded promising behavior as battery positives in lithium perchlorate-dimethyl sulfite solutions. Lithium perchlorate and sodium trifluoromethane sulfonate are both modestly soluble in these solvents yielding conductivities in the 0.01 mho/cm range. The dielectric constant of TMSO is 42.5 at 23.3C while the dielectric constant of dimethyl sulfite is 22.5 at 23.3C. Dimethyl sulfite appears particularly interesting because of its wide range (-140C to +126C), its low viscosity (0.75 at 30C), and its low density (1.198 at 30C). Salts in TMSO appear completely dissociated while those in dimethyl sulfite are only partly ionized. The conductivities, viscosities, and densities of TMSO and dimethyl sulfite are reported as functions of temperature and concentration. Selected measurements are also reported for electrolyte solutions pf 1,3 butylene glycol sulfite and ethyl methane sulfonate. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1967
- Accession Number
- AD0826554
Entities
People
- Douglas N. Bennion
- Emmanuel D'orsay
- Neng Ping Yao
Organizations
- University of California, Los Angeles