Layered SnS2 cross-linked by carbon nanotubes as a high performance anode for sodium ion batteries

Abstract

A SnS₂@CNT nanocomposite as a high performance sodium-ion battery anode material is prepared via a facile sintering route. Benefiting from the high conductivity and strong mechanical properties of the CNTs, the SnS₂@CNT with a unique nanostructure of 2D SnS₂ sheets cross-linked by 1D CNTs, delivers a high reversible capacity of 758 mA h g⁻¹ at 100 mA g⁻¹ and an excellent cyclability with a capacity retention of 87% over 300 cycles. More impressively, over 445 mA h g⁻¹ can be obtained at a high current density of 5 A g⁻¹, demonstrating a superior rate capability.