Accession Number : AD0753096

Title :   Battery Zinc Electrode Kinetics Investigation.

Descriptive Note : Final rept. 15 Dec 72,

Corporate Author : CALVIN COLL GRAND RAPIDS MICH DEPT OF CHEMISTRY

Personal Author(s) : Dirkse,T. P.

Report Date : 15 DEC 1972

Pagination or Media Count : 81

Abstract : Time-to passivation studies have been made on the zinc electrode in a range of KOH solutions. Attempts to interpret results in terms of rate at which charge transfer product dissolves encountered theoretical difficulties. Limiting diffusion currents have been measured in 1 to 13.4 M KOH over a temperature range of -33 to 44C. The diffusion coefficients of the zincate ion have been measured polarographically. The exhange current densities of the zinc electrode in KOH solutions were measured over a temperature range of -33 to +55C in 1 to 14 molar KOH. Galvanostatic, double impulse, and potentiostatic methods were used. Double layer capacitance of the zinc electrode was also measured at room temperature in a variety of solutions. An NMR study of Zincate Solutions shows only evidence for Zn(OH)4(-2). (Author)

Descriptors :   (*ZINC, *ELECTROCHEMISTRY), (*ELECTRODES, ELECTROCHEMISTRY), DIFFUSION, HYDROXIDES, ELECTROLYTES, SOLUTIONS(MIXTURES), ELECTRIC DOUBLE LAYER, NUCLEAR MAGNETIC RESONANCE

Subject Categories : Physical Chemistry
      Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE