SnS<sub>2</sub> nanoplates as stable anodes for sodium ion and lithium ion batteries

<p>Tin disulphide (SnS<sub>2</sub>) nanoplates with an average lateral size of ~40 nm and thickness of approximately 7 nm were synthesised through a facile hydrothermal method between SnCl<sub>4</sub>·5H<sub>2</sub>O and thioacetamide. The as-synthesised SnS<sub>2</sub> nanoplates exhibit improved electrochemical performances for both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). In the LIBs electrochemical tests, anode consisting of SnS<sub>2</sub> nanoplates presents a stable reversible capacity of 515 mAh/g under a current density of 0.1 A/g after 50 cycles. When utilising SnS<sub>2</sub> nanoplates as SIB anode, a reversible capacity of 241.5 mAh/g is delivered at the 50th cycle under a current density of 0.1 A/g, retaining 70% of the first reversible capacity (349 mAh/g). Furthermore, to explore the practical application of SnS<sub>2</sub> anode for sodium storage, an Na<sup>+</sup> full cell is assembled by pairing SnS<sub>2</sub> anode with Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> cathode. The Na<sup>+</sup> full cell delivers an initial discharge capacity of 346 mAh/g and slowly decays to 195 mAh/g after 50 cycles at a current density of 0.5 A/g.</p>