Optimized structural dimensionality of CuSbS₂as an anode material in sodium-ion batteries

Abstract

Rapidly escalating interest toward sodium-ion batteries (SIBs) for extensive energy-storage applications has been witnessed in the past decade owing to the abundance of sodium. Anode materials possessing combined characteristics of conversion and alloying mechanisms have high prospects for SIBs owing to their high theoretical capacities and relatively low working voltages. Herein, we report the anodic performance of CuSbS₂ for SIBs possessing conversion and alloying mechanism with fine-tuning of dimensionality by varying the molar quantity of sulfur. The CuSbS₂ anode demonstrated one of the highest reported charge capacities of 650 mAhg^-1. An increase in sulfur content facilitated 60% capacity retention even at high currents of 200 mAg^-1 stabilization of the Na₂S matrix, which aids in accommodating the volume changes during the cycling process, thereby enhancing the cycling life.