Accession Number : AD0828224

Title :   LONG LIFE STABLE ZINC ELECTRODES FOR ALKALINE SECONDARY BATTERIES.

Descriptive Note : Quarterly rept. no. 3, 1 Jun-3 Aug 67,

Corporate Author : YARDNEY ELECTRIC CORP NEW YORK

Personal Author(s) : Goodkin, J.

Report Date : JAN 1967

Pagination or Media Count : 42

Abstract : Edge overlap-zinc oxide addition combinations have resulted in up to 25% capacity improvement. A 1:1 relationship between capacity and zinc per Ampere-hour was observed. Teflon content increases from 7% to 9% improved performance 10%. Lowering the cure temperature also improved performance, but the change was small. Better electrode performance is obtained at high c.d. when a Teflon binder is used. Carbon-activated recombination electrodes were found to give good end-of-charge signals. A cut-off device was designed to by-pass sealed cells on signal. Cycling on the 6-hr. regime has shown that 300 cycles are easily obtainable. Cycle life can be increased substantially by increasing the end-of-charge cut-off. Reference electrode control of charge cut-off is under investigation. Geometry considerations have resulted in the development of an electrode with more zinc at the edges and a center pocket. Cells with this type of electrode have vastly improved performance over the first 114 cycles. (Author)

Descriptors :   *ZINC), (*ALKALINE BATTERIES, ELECTRODES), (*ELECTRODES, STORAGE BATTERIES, ZINC COMPOUNDS, OXIDES, BINDERS, HALOCARBON PLASTICS, ADDITIVES, CARBON, ELECTRICAL PROPERTIES, PERFORMANCE(ENGINEERING), BATTERY SEPARATORS.

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE