Chloro-propylene sulfite as electrolyte additive for Li/S batteries

Chloro-propylene sulfite (CIPS) was employed as electrolyte additive of Li/S batteries for the first time. Linear potential sweep test showed that the CIPS keeps high electrochemical stability even under the voltage of 5.0V. Being used as electrolyte additive in Li/S batteries, CIPS displayed an excellent property for self-discharge prohibition. With CIPS additive the Li/S cells' initial discharge capacity was 856.2 mAh(.)g(-1) and 830.8 mAh(.)g(-1) at the current density of 15 mA(.)g(-1) and 30 mA(.)g(-1) after 30 cycles the discharge capacities were contained at as high as 753.8 mAh(.)g(-1) and 715.6 mAh(.)g(-1). By means of infrared spectra, TG/DTA experiment and element content analysis the speculated reason of CIPS's novel function as additive was proposed.