Electrostatically Assembled Sb2S3/MXene Nanocomposites As Anode Materials for High-Performance Lithium-Ion Batteries

Abstract

Antimony sulfide (Sb₂S₃) possesses a high theoretical capacity and excellent reversibility, making it a promising anode material for lithium-ion batteries (LIBs). However, its poor intrinsic conductivity and significant volume changes during charge/discharge cycles severely limit its cycling stability and rate performance. In this study, a novel composite material was synthesized by electrostatically assembling Sb₂S₃ nanowires (Sb₂S₃ nw) onto MXene nanosheets as a potential anode material (SbSMX). The introduction of highly conductive MXene substrates enhances electron transfer between the distinct interfaces of Sb₂S₃ and MXene. Additionally, the constructed 1D–2D structure promotes ion transport within the electrode, while the mechanical flexibility of MXene effectively mitigates the severe volume expansion of Sb₂S₃. As a result, the SbSMX composite exhibits a high capacity of 813 mA h g^–1 at a current of 50 mA g^–1, stable cycling performance with a capacity of 735 mA h g^–1 after 100 cycles at 100 mA g^–1 (88% retention), and excellent rate capability, achieving 466 mA h g^–1 at a current of 3 A g^–1.