The fabrication of ZIF‐L derived ZnS/MoS2@NC anode materials for remarkable lithium‐ion storage

Abstract

The enhancement of electrochemical performance in lithium‐ion batteries can be achieved through the incorporation of MoS2 with carbon materials and various metal sulfides. In this investigation, a MoS2/ZnS heterostructure was devised incorporating a two‐dimensional nitrogen‐doped carbon nanosheet (NC) backbone. The synthesis of ZnMo‐ZIF‐L precursors was achieved by introducing a Mo source in a 1:1 molar ratio during ZIF‐L synthesis. Subsequent to high‐temperature carbonization and vulcanization treatment, ZnS/MoS2@NC composite materials were successfully synthesized. Compared to the unvulcanized ZnO/MoO3@NC and MoS2 samples, the ZnS/MoS2@NC composite exhibits remarkable lithium storage performance. At a current density of 500 mA g‐1, the initial discharge specific capacity is 2547 mAh g‐1, with an initial charge specific capacity of 1674 mAh g‐1, resulting in a first Coulombic efficiency of 65.76%. Furthermore, this composite material demonstrates optimal rate capabilities and a significant pseudocapacitance contribution. The nitrogen‐doped carbon framework effectively mitigates volume effects, while the heterostructural design provides more active sites for lithium ions, thereby enhancing lithium storage performance.