Accession Number : AD0824719

Title :   LONG LIFE STABLE ZINC ELECTRODE FOR ALKALINE SECONDARY BATTERY.

Descriptive Note : Quarterly rept. no. 2, 1 Mar-31 May 67,

Corporate Author : YARDNEY ELECTRIC CORP NEW YORK

Personal Author(s) : Goodkin, Jerome

Report Date : DEC 1967

Pagination or Media Count : 45

Abstract : The effect of curing temperature on the performance of Teflonated zinc oxide was continued. Results of 30% D.D., 60% D.D. and charge rates of both .3 and .6C, show that the curing temperature should be no higher than 300C, and probably closer to 275C. Electrodes prepared from such material have cycle lives from two to three times that of the control electrodes. Studies of the effect of Teflon concentration were made in the range between 5% and 7% Teflon, with temperature as a second variable. An equation was obtained for the effect of temperature and concentration on cycle life and X1 and X2 are the statistically coded values for concentration and temperature. The effect of the ratio of negative electrode-to-positive electrode area and zinc-to-silver weight ratio on cell performance including the effect of Teflon concentration, was initiated. The use of calcium hydroxide in stoichiometric concentrations, to prevent shape change, was investigated. Its use in silver-zinc cells, where high concentrations of KOH are required, is counter-indicated by the substantial loss in capacity during initial cycles. The use of carbon-activated third electrodes as signalling devices shows good differential current at the end of charge. (Author)

Descriptors :   *ZINC), (*STORAGE BATTERIES, ELECTRODES), (*ALKALINE BATTERIES, ELECTRODES), (*ELECTRODES, ZINC COMPOUNDS, OXIDES, BINDERS, HALOCARBON PLASTICS, CONCENTRATION(CHEMISTRY), SILVER, ELECTROLYTES, CALCIUM COMPOUNDS, HYDROXIDES.

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE