A Simple One-Pot Strategy for Synthesizing Ultrafine SnS2 Nanoparticle/Graphene Composites as Anodes for Lithium/Sodium-Ion Batteries.

Abstract

SnS2 /graphene composites have attracted extensive attention in energy storage owing to their excellent electrochemical performance. However, most of the previous methods to synthesize SnS2 /graphene composites require long times, high temperatures, or high pressures, which are obstacles for practical low-cost production. A simple one-pot strategy to prepare SnS2 /graphene composites has been developed, which is not time-consuming (1 h) and requires moderate temperature (75 °C) in atmosphere. Through this method, ultrafine SnS2 nanoparticles anchored on graphene nanosheets are prepared and exhibit excellent electrochemical performance for both lithium and sodium storage. Specifically, as anodes for lithium-ion batteries, the SnS2 /graphene electrode delivers a high capacity of 1480 mAh g-1 after 50 cycles at 0.2 A g-1 . Even at 10 A g-1 , the SnS2 /graphene electrode can achieve a capacity of 666 mAh g-1 . A constructed full lithium-ion cell exhibits a capacity of 957 mAh g-1 after 50 cycles at 1 A g-1 . This simple one-pot strategy may pave the way for large-scale production and practical application of SnS2 /graphene composites in energy storage.