Yu Hao, Yaru Cui, Juan Wang, Jinpeng Hu, Qinghuan Tang, Chao Wu, Shufeng Yang
The growing demand for advanced sodium-ion batteries (SIBs) necessitates the development of high-rate and durable anode materials. However, conventional ZnS-based anodes often suffer from sluggish ion transport kinetics and structural instability during cycling. Herein, a hierarchical ZnS/MoS 3 composite with a carbon matrix (ZSCM) was synthesized through a MOF-derived carbonization–sulfurization route followed by an amorphous MoS 3 surface modification. This unique architecture combines a conductive 3D carbon framework, abundant heterointerfaces, and multiphase synergy, which significantly enhance charge transport and interfacial reaction kinetics. As a result, the ZSCM anode delivers a high reversible capacity of 559.3 mAh·g –1 at 0.1 A·g –1 and maintains 370.8 mAh·g –1 even at 10 A·g –1 . Structural and spectroscopic analyses reveal a multistep sodium storage mechanism involving the irreversible conversion and partial alloying of ZnS, along with the stepwise reduction and partial reoxidation of MoS 3 . Moreover, the ZnS/MoS 3 heterointerface induces a built-in electric field due to interfacial work function differences, which facilitates charge redistribution and accelerates ion/electron migration. The assembled full cell with Na 3 V 2 (PO 4 ) 3 as the cathode further confirms the practical applicability of this design. This work offers mechanistic insights and an effective strategy for constructing ZnS-based anodes toward high-performance, multistep sodium storage.