Enhanced cycling performance of a high-energy and low-cost lithium–sulfur battery with a sulfur/hardwood charcoal composite cathode material

摘要: Lithium–sulfur battery is an attractive candidate for advanced energy storage devices due to its high specific of 2600 Wh kg−1 arising from the theoretical capacity (1675 mAh g−1) sulfur cathode. However, short cycle life and low cycling efficiency are still main obstacles preventing practical development this promising system. In work, we show that a low-cost Li/S cell employing activated hardwood charcoal–sulfur (S–AHC) nanocomposite cathode can be operated more than 300 cycles while maintaining (600 coulombic 97 %, achieved by new formulation liquid electrolyte containing fluorinated solvent. Such improved retention life, as compared conventional counterparts, prove active mass lost via polysulfide dissolution effectively inhibited utilization solution. Considering these results, believe consisted composite may proposed applications.