COMPARISON OF CATHODE UTILIZATION BETWEEN POLYMERIC ORGANODISULFIDE AND TITANIUM DISULFIDE IN SOLID POLYMER ELECTROLYTE RECHARGEABLE LITHIUM CELLS

Cathode utilization of a polymeric organodisulfide prepared from 2,5-d imercapto-1,3,4-thiadiazole was compared, with that of titanium disulf ide in an all-solid-state, thin film, rechargeable cell based on a sol id polymer electrolyte operated at 95 degrees C. The cathode utilizati on of the polymeric organodisulfide was remarkably enhanced by the use of LiN(CF3SO2)(2) instead of LiCF3SO3 in a polyethylene oxide-based e lectrolyte and achieved up to 80 % (1.3 mAhcm(-2)) at a 0.5 mAcm(-2) d ischarge rate, where 30 wt % of the active material was loaded in the cathode. The cathode utilization of titanium disulfide was almost the same as the polymeric organodisulfide at equivalent loading levels on a volume basis.