Single step transformation of sulphur to Li2S2/Li2S in Li-S batteries

• DOI: 10.1038/srep12146
• Publication Date: 2015-07-15T10:39:19Z
• Authors: M. Helen; M. Anji Reddy; Thomas Diemant; Ute Golla-Schindler; R. Jürgen Behm; Ute Kaiser; Maximilian Fichtner
• Keywords: Carbon fibers

Abstract Lithium-sulphur batteries have generated tremendous research interest due to their high theoretical energy density and potential cost-effectiveness. The commercial realization of Li-S is still hampered by reduced cycle life associated with the formation electrolyte soluble higher-order polysulphide (Li 2 S x , = 4–8) intermediates, leading capacity fading, self-discharge a multistep voltage profile. Herein, we realized practical approach towards direct transformation sulphur Li /Li in lithium-sulphur alteration reaction pathway. A coconut shell derived ultramicroporous carbon-sulphur composite cathode has been used as directing template for sulphur. lithiation/delithiation fading mechanism microporous carbon confined was revealed analyzing subsurface using X-ray photoelectron spectroscopy. No polysulphides were detected electrolyte, on surface composite. altered pathway reflected single-step profile discharge/charge cell.