Abstract: The effects of electrolyte composition and temperature on the performance of 240mAh-laboratory-prototype button Li/S cells were studied. The cells' electrolyte was lithium polysulfide saturated solution of 1M LiC10/sub 4/ in a THF-toluene mixture. This cell exhibits flat discharge curves above 2V at the temperature range of -20 to 60/sup 0/C. At low discharge rates the cell delivers 90% or more of its nominal capacity at the full temperature range. Its room temperature energy density is 730wh/kg or 950Wh/1 (calculated on the basis of all cell components, excluding the case). The self-discharge rate at 60/sup 0/C was found to decrease with the decrease in the concentration of THF and with the length of the polysulfide chain. The lowest measured self-discharge is 1.3% per month at 60/sup 0/C. This is equivalent to a shelf life or low rate operation time of 25 years at room temperature.
Publication Year: 1983
Publication Date: 1983-10-01
Language: en
Type: article
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Cited By Count: 1
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