Silver Oxide/Zinc Rechargeable Lithium Cells: A Comparison with High Energy Density Lithium/Lithium Cobalt Oxide.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1995
- Accession Number
- ADA308902
Entities
People
- C. J. Kelly
- C. W. Fleischmann
- D. L. Chua
- H-p. W. Lin
- P. H. Smith