Accession Number:

ADA250027

Title:

Advanced Rechargeable Lithium Sulfur Dioxide Cell

Descriptive Note:

Final rept. Sep 1988-Feb 1991

Corporate Author:

YARDNEY TECHNICAL PRODUCTS INC PAWCATUCK CT

Report Date:

1991-11-01

Pagination or Media Count:

126.0

Abstract:

The electrochemical performance and safety of the rechargeable lithium sulfur dioxide system has been investigated in laboratory cells and in high rate D cells. Small design and active materials were optimized to that cathode utilization of 1.6Ahgram of carbon and 0.19Ahcm3 of cathode were achieved with 100-200 cycles. Discharge and charge of cells at temperatures down to -30 deg C were examined, as were pulse discharge, storage, high temperature, and voltage delay. Analytical techniques were developed for determination Of S02 electrolyte phase behavior and analysis of lithium dithionate degradation product. Cell venting, shorting, and over-heating remain persistent problems as the testing proceeds to the larger spiral-wound cell. Cell venting seems to occur the most on charge, or shortly thereafter, and is associated with accumulation of reactive side-products. Large cell electrodes are pyrophoric when examined in air after extensive cycling.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE