Unlocking the Potential of MoS2@ZnFeS Nanosheet Catalyst as an Anode Electrode Material for Synergistic Improvement of Capacity and Durability in Lithium-Ion Battery Performance

Abstract

It is indispensable to enhance the capacity and stability of electrodes to improve the overall activity of lithium-ion batteries. This study explores the development of a lithium-ion battery (LIB) anode using a molybdenum disulfide and zinc–iron sulfide (MoS₂@ZnFeS) composite to enhance energy storage performance. MoS₂@ZnFeS nanosheets were synthesized through a two-step hydrothermal process, resulting in a unique heterostructure characterized by a high electroactive surface area and numerous buffer zones that facilitate volume expansion during lithium intercalation. Electrochemical analysis revealed that the MoS₂@ZnFeS anode achieved an ultra-high reversible capacity of 685.3 mA h g⁻¹ after 200 cycles at 0.1 A g⁻¹, exhibiting excellent capacity retention with only 0.017% capacity loss per cycle at 0.1 A g⁻¹ over 1000 cycles. Additionally, the anode demonstrated a high rate capability of 221.1 mA h g⁻¹ at 2 A g⁻¹. The exceptional lithium-storage capability of MoS₂@ZnFeS can be attributed to its extensive network of ion exchange pathway and its robust structural integrity. These findings underscore the potential of MoS₂@ZnFeS as a high-performance anode material for next-generation LIBs, offering significant advantages in energy storage applications.