Electrochemical Properties of Tin-Antimony Sulfide Nanocomposites Synthesized by Hydrothermal Method as Anode Materials for Sodium Ion Batteries

Tin-antimony sulfide nanocomposites were prepared via hydrothermal synthesis and a N2 reduction process for use as negative electrode in sodium ion battery. The electrochemical energy storage performance of the battery was analyzed according to tin-antimony composition. optimized sulfides exhibited superior charge/discharge capacity (770 mAh g-1 at current density 100 mA g-1) stable lifespan characteristics (71.2 % after 200 cycles 500 g-1). It reversible characteristic, continuously participating charge-discharge process. improved cycle stability attributed small particle size, by controlling composition sulfide. By optimizing ratio during process, it did not deviate from solubility limit. Graphene oxide also acts suppress volume expansion reaction. Based on these results, is considered promising anode material used medium-to-large source.