Accession Number : AD0622818

Title :   HIGH ENERGY BATTERY SYSTEM STUDY.

Descriptive Note : Rept. no. 8 (Final), 1 Jul 63-30 Jun 65,

Corporate Author : ROCKETDYNE CANOGA PARK CALIF

Personal Author(s) : Farrar,J. ; Keller,R. ; Nicholson,M. M.

Report Date : 30 JUN 1965

Pagination or Media Count : 69

Abstract : Lithium, magnesium, and aluminum were studied as anode materials in statistically planned experimentation. Calcium and beryllium were also examined during subsequent tests. Lithium emerged as the outstanding anode material with a mean open circuit potential of -2.71 volts vs Ag/AgBr, limiting currents exceeding 10 ma/sq. cm., and utilization efficiencies of approximately 100 percent. Two dozen solids were tested as potential cathode sq. cm. materials. At low discharge rates of 1 to 5 ma/sq. cm. BrCN, CuCl2, and CuF2 proved to be the most promising although performances were less favorable at higher current densities. Bromine and water showed the best prospect for attaining the performance goal although they can only be used in reserve systems. Propylene carbonate was favored as the electrolyte solvent for a lithium cell, with 0.03/ohm/cm being the highest conductivity value observed for organic aprotic electrolytes. Calculations show that BrCN, CuCl2 or CuF2 cathodes coupled with lithium anodes can meet the performance goals for this program. (Author)

Descriptors :   (*PRIMARY BATTERIES, ELECTROCHEMISTRY), (*ELECTRODES, MATERIALS), (*ELECTROLYTES, ORGANIC MATERIALS), LITHIUM, MAGNESIUM, ALUMINUM, CYANOGEN, BROMIDES, CHLORIDES, FLUORIDES, COPPER COMPOUNDS, SILVER COMPOUNDS, BROMINE, CARBONATES, PERFORMANCE(ENGINEERING)

Distribution Statement : APPROVED FOR PUBLIC RELEASE