Accession Number : ADA274908


Title :   Advanced Rechargeable Lithium Sulfur Dioxide Cell


Descriptive Note : Final rept. Sep 88-Feb 91,


Corporate Author : YARDNEY TECHNICAL PRODUCTS INC PAWCATUCK CT


Personal Author(s) : McDonald, R C ; Harris, P ; Goebel, F ; Hossain, S ; Vierra, R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a274908.pdf


Report Date : Nov 1991


Pagination or Media Count : 128


Abstract : The electrochemical performance and safety of the rechargeable lithium sulfur dioxide (Li/SO2) 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 1.6Ah/gram of carbon and 0.19Ah/cu 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.


Descriptors :   *ELECTROCHEMISTRY , *LITHIUM BATTERIES , *SULFUR , *DIOXIDES , DEGRADATION , VOLTAGE , ELECTROLYTES , CATHODES , CARBON , HIGH TEMPERATURE


Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Electrochemical Energy Storage


Distribution Statement : APPROVED FOR PUBLIC RELEASE