Interface regulation strategy in constructing ZnS@MoS2 heterostructure with enhanced surface reaction dynamics for robust lithium-ion storage

Heterostructure construction is an effective method used to synthesize lithium-ion battery anode materials with high electrochemical performance. In this study, an interface regulated ZnS@MoS2 heterostructure was achieved through a designed solvothermal strategy. The designed strategy introduces interface regulation in the heterostructure, increasing active sites for lithium adsorption and improving the overall dynamics of lithium-ion storage. The build-in electric field is introduced at the interfaces enhancing electron transfer and lithium migration. Ex-situ analyses confirmed the enhanced lithium storage performance in the heterostructure is derived from the stepwise reaction mechanism and the stepwise reactions contribute to cycling stability. DFT calculations revealed electron redistribution at the interfaces in the heterostructure boosting the lithium-ion migration and electron transfer. The interface regulated ZnS@MoS2 heterostructure exhibits outstanding lithium-ion storage performances in both half and full cells. Specifically, the high capacity of 996.0 mAh g−1 is achieved at 5 A g−1 after 1000 rounds, demonstrating remarkable lithium storage performance. This research presents a promising approach to enhance heterostructure electrochemical performance through interface regulation strategies.