Micro–Nanostructure Designed CoP@MoS₂ Accelerating Polysulfide Conversion and Reaction Kinetics for Lithium–Sulfur Battery

The shuttle effect and sluggish conversion kinetics of lithium polysulfides are the main bottlenecks for the widespread application of the lithium–sulfur (Li-S) battery. Herein, by incorporating the merits of high electronic conductivity and highly dispersed micrometer-scale cobalt phosphide (CoP) with excellent catalytic activity, molybdenum disulfide (MoS2), uniformly dispersed MoS2 nanosheets on the surface of micrometer-scale cube CoP can be developed, which endows CoP@MoS2 the merits of smooth ion/electron transfer paths, highly effective catalysis, and maximum catalytic active sites. After applying as a separator modifier in Li-S battery, the battery can deliver a high initial discharge capacity (1321 mAh g–1 at 0.1 C), high rate capability (837 mAh g–1 at 2 C), and stable cycling performance (0.101% capacity decay after 250 cycles at 0.5 C), suggesting great application prospects of the micro–nanostructure catalyst in Li-S batteries.