Abstract:A strategy was reported to obtain high capacity with long cycle life by introducing a molybdenum disulfide (MoS2) coating on the separator. MoS2 which was synthesized by a facile, one-pot hydrothermal method was coated on the separator by simple pumping filtration without any binder to inhibit the polysulfide shuttling effect. The morphology and physical property of MoS2 and the separator coated with MoS2 were characterized by SEM、XRD and BET. The electrochemical performances of lithium sulfur batteries(Li?S batteries) were studied by electrochemical workstation and battery test station. In spite of the use of a simple sulfur–carbon black mixture as cathode, the Li?S cell with a MoS2-coated separator offered outstanding performances with an initial capacity of 1010 mAh/g and 432 mAh/g after 150 cycles at 400 mA/g. In the same conditions, the Li?S cell with a Celgard separator offered performances with an initial capacity of 816 mAh/g and 297 mAh/g after 150 cycles at 400 mA/g. The improved results could be owned to the MoS2 coating, which not only reduced the cell resistance but also blocked the diffusion of soluble polysulfides avoiding shuttle effect during cycling. This study demonstrated a viable and low cost approach to address the long-life cycling challenge for Li?S batteries.