Electrochemically Boosting Redox Kinetics of Polysulfides via Heterostructure of MoN-ZnS

In spite of its high theoretical energy density, environmental benignity, and low raw materials costs, lithium-sulfur batteries behave several inherent shortcomings, including low ionic/electronic conductivity and a severe polysulfide shuttle effect. In this work, MoN-ZnS cathode with a hollow polyhedral architecture is designed for the comprehensive enhancement of electrochemical performances. Specifically, MoN constructs an efficient electron transport network for redox conversion of polysulfides through. Meanwhile, ZnS chemically anchors polysulfides with polar sites, which effectively suppresses polysulfide dissolution and shuttling. DFT results convey that MoN-ZnS enhances the charge transfer and redox conversion of LiPSs through binding correlation and energy-level modulation. At 0.1 C, MoN-ZnS cathode initially delivers 922 mAh g^-1. Consequently, an important design strategy based on heterostructures is provided for the development of high-performance LSBs.