Enhanced Electrochemical Performance of NiSbS/NiSb/NiS Nanocomposites Anchored on Graphite Nanosheets for Sodium-Ion Battery Applications

Abstract

In the realm of scalable fabrication of anodes through ball-milling, ensuring high electrochemical performance and robust cycling stability anodes for sodium-ion batteries is paramount but presents a formidable hurdle. In pursuit of these goals, a distinctive hybrid composite distinguished by its intricate multiphase composition have devised. This entails the integration of innovative NiSbS/NiSb/NiS nanomaterials onto exfoliated graphite nanosheets (Ni-Sb-S/GN) via a straightforward technique. Analyses indicates the interplay between graphite nanosheets and the hybrid Ni-Sb-S, in conjunction with the discharge byproducts of Na2S, substantially augment the stability and Na-ion diffusion kinetics of the Ni-Sb-S/GN anode. The novel Ni-Sb-S/GN exhibits markedly superior electrochemical performance in comparison to its Ni-Sb-S counterpart. Specifically, Ni-Sb-S/GN achieves a reversible capacity of 238.7 mAh g-1 at 0.2 A g-1 post 300 cycles, remains notable capacities of 200 mAh g-1 after 1000 cycles under 1 A g-1, respectively, translating to high capacity retention rates of 83.8% from the 2nd cycle. This contribution presents a novel avenue for the exploitation of advanced multiphase anodes exhibiting superior capacity, rate capability, and cycling durability.