Accession Number : ADA119297

Title :   Ambient Temperature Rechargeable Lithium Battery.

Descriptive Note : Final rept. 1 Mar 81-28 Feb 82,

Corporate Author : EIC LABS INC NEWTON MA

Personal Author(s) : Abraham,K M ; Natwig,D L ; Harris,P B ; Avery,J W

PDF Url : ADA119297

Report Date : Aug 1982

Pagination or Media Count : 102

Abstract : Cr0.5V0.5S2 has been characterized as a useful positive electrode material for rechargeable Li cells. The positive electrode reaction involves intercalation of Li during discharge and deintercalation of Li during recharge. A discharge capacity equivalent to nearly le-/Cr0.5Vo.5S2 has been obtained in early cycles at low rates. The average capacity which could be realized in long-term cycling appears to be 0.7-0.8e-/Cr0.5V0.5S2. Laboratory cells exceeded 200 deep discharge cycles. Although Cr0.5V0.5S2 and its Li intercalates are good electronic conductors, optimum rate and rechargeability were found in electrodes with 15-20 weight percent carbon. Because of this relatively large amount of carbon, the volumetric energy density achieved in cells has been significantly lower than what was anticipated at the outset of the program. The major objective of the program, development of a technology base for the construction of large rechargeable Li cells, has been accomplished. Cells with theoretical capacities of 10 and 20 Ah have been constructed and tested. In limited cycle tests, these large cells performed as well as laboratory test cells.

Descriptors :   *Electric batteries, *Reusable equipment, *Battery chargers, *Lithium compounds, X ray diffraction, Anodes(Electrolytic cell), Cathodes(Electrolytic cell), Energy storage, Power supplies, Voltage, Density, Rejuvenation, Low temperature, Electrical conductivity, Chromium, Sulfur, Vanadium, Synthesis(Chemistry), Optimization, Life cycle testing

Subject Categories : Inorganic Chemistry
      Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE