Li-alloy/transition-metal sulfide cells designed for overcharge tolerance

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6518661

Redey, L

To explore the capability of the controlled self-discharge process for chemical overcharge protection, several LiAlSi/LiF-LiCl-LiBr- MgO/FeS and LiAlSi/LiCl-LiBr-KBr-MgO/FeS cells were built and tested. The electrode material formulas do not indicate real compounds; they merely represent electrode compositions that are normalized to one mole of the negative matrix material (Al and Si), thereby fixing the atom ratios of Al:Si:Fe:S in the cell. Overcharge is a serious problem in batteries. Maintaining the charge voltage of each cell at or below the voltage limit and simultaneously reaching equal capacity in each series-connected cell of a lithium-alloy/metal sulfide battery over many cycles are difficult tasks. For lithium-alloy/monosulfide cells, a possible method of chemical overcharge protection is use of a controlled self-discharge process, as described in this article. 11 refs., 3 figs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6518661
• Report Number(s): CONF-881061-14; ON: DE89007504
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250901* -- Energy Storage-- Batteries-- Design & Development
250903 -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALLOYS
ALUMINIUM ALLOYS
BATTERY SEPARATORS
CHALCOGENIDES
CONTROL
DISSOLUTION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTRODES
KINETICS
LITHIUM ALLOYS
OVERVOLTAGE
REACTION KINETICS
SILICON ALLOYS
SULFIDES
SULFUR COMPOUNDS