Accession Number : ADA308902

Title :   Silver Oxide/Zinc Rechargeable Lithium Cells: A Comparison with High Energy Density Lithium/Lithium Cobalt Oxide.

Descriptive Note : Final rept. 24 Sep 89-1 Mar 92,

Corporate Author : ALLIANT TECHSYSTEMS INC HORSHAM PA POWER SOURCES CENTER

Personal Author(s) : Lin, H-P. W. ; Kelly, C. J. ; Chua, D. L. ; Fleischmann, C. W. ; Smith, P. H.

PDF Url : ADA308902

Report Date : NOV 1995

Pagination or Media Count : 96

Abstract : Commercial, 30-ampere-hour Silver Oxide/Zinc (AgO/Zn) cells were evaluated for cycle life and charge retention. Results were compared to recently developed 30-ampere-hour Lithium/Lithium Cobalt Oxide (Li/Li(x)CoO2) cells. Prior to cycling at -2 deg C, +23 deg C, and +35 deg C, some cells were stored up to three months under four storage conditions: +23 deg C charged, +23 deg C discharged, +35 deg C charged, and +35 deg C discharged. Cells were discharged at the six hour rate. Cycling continued until discharge capacity fell to 25 Ampere-hour (Ah) at room temperature, cells delivered about 40 watt-hours per pound (Wh/lb). Performance improved at +35 deg C but severely degraded at -2 deg C. The lithium cells provided almost 60-Wh/lb. Silver Oxide/Zinc cells stored charged at +23 deg C for three months lost one-third of their initial capacity; those stored at +35 deg C lost half of their initial capacity. Even slow charging could not restore the loss. Discharged cells stored better, but capacity fell off more rapidly.

Descriptors :   *ZINC, *LITHIUM BATTERIES, *SILVER ZINC BATTERIES, *SILVER OXIDES, CELLS, ELECTROCHEMISTRY, ROOM TEMPERATURE, HIGH ENERGY, OXIDES, RETENTION(GENERAL), HIGH DENSITY, LIFE CYCLES, STORAGE, COBALT.

Subject Categories : Inorganic Chemistry
      Electrochemical Energy Storage
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE