Advanced Rechargeable Lithium Sulfur Dioxide Cell
Final rept. Sep 88-Feb 91,
YARDNEY TECHNICAL PRODUCTS INC PAWCATUCK CT
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The electrochemical performance and safety of the rechargeable lithium sulfur dioxide LiSO2 system has been investigated in laboratory cells and in high rate D cells. Small cell design and active materials were optimized so that cathode utilization of 1.6Ahgram of carbon and 0.19Ahcu cm of cathode were achieved with 100-200 cycles. Discharge and charge of cells at temperatures down to 30 deg C was examined as were pulse discharge, storage, high temperature and voltage delay. Analytical techniques were developed for the determination of SO2 electrolyte phase behavior and for the 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 appears to occur mostly 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.
- Inorganic Chemistry
- Physical Chemistry
- Electrochemical Energy Storage