MoS2-Coated N-doped Mesoporous Carbon Spherical Composite Cathode and CNT/Chitosan Modified Separator for Advanced Lithium Sulfur Batteries

The polysulfide shuttle effect is one of the most important problems hindering the commercial application of lithium–sulfur batteries (LSBs). In order to solve the above problem and promote LSBs commercialization, herein a holistic design strategy on the molybdenum disulfide-coated nitrogen-doped mesoporous carbon sphere/sulfur (NMCS@MoS2/S) composite cathode and carbon nanotube/chitosan modified separator (CNT/CH) is proposed. In the holistic design, the NMCS@MoS2 plays a role in the host of sulfur and the lithium polysulfides (LiPSs) adsorbent; the CNT/CH modified separator also has an inestimable role in promoting lithium ion transport and chemical adsorption of LiPSs. The results show that the LSBs with the NMCS@MoS2/S-CNT/CH release a high reversible capacity of 827 mAh g–1 with a high capacity retention of 92.4% at 0.5 C after 200 cycles. The delicate design exhibits apparently excellent electrochemical performance and provides an exciting strategy for solving the shuttle effect of LiPSs and boostin...