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.

Recent advances in rational design for high-performance potassium-ion batteries

“…In electrolytes containing KFSI, a stable, protective, and KF-rich SEI layer is formed on MoS 2 , while in electrolytes containing KPF 6 , an unstable, KFpoor, and organic-rich SEI layer is formed. Ahuja et al 634 compared the performance of Bi 2 Sn 2 O 7 in KFSI-based electrolytes and KPF 6 -based electrolytes and found that the capacity decay was severe in the latter. Huang et al 654 studied the potassium storage performance of the SnO 2 @C composite in 0.8 M KPF 6 in EC/DEC and 3 M KFSI in DME.…”