High reversible capacity of SnO2/graphene nanocomposite as an anode material for lithium-ion batteries

A gas–liquid interfacial synthesis approach has been developed to prepare SnO2/graphene nanocomposite. The as-prepared nanocomposite was characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and Brunauer–Emmett–Teller measurements. Field emission scanning electron microscopy and transmission electron microscopy observation revealed the homogeneous distribution of SnO2 nanoparticles (2–6 nm in size) on graphene matrix. The electrochemical performances were evaluated by using coin-type cells versus metallic lithium. The SnO2/graphene nanocomposite prepared by the gas–liquid interface reaction exhibits a high reversible specific capacity of 1304 mAh g−1 at a current density of 100 mA g−1 and excellent rate capability, even at a high current density of 1000 mA g−1, the reversible capacity was still as high as 748 mAh g−1. The electrochemical test results show that the SnO2/graphene nanocomposite prepared by the gas–liquid interfacial synthesis approach is a promising anode material for lithium-ion batteries.

► Gas-liquid interfacial reaction was used to prepare SnO2/graphene nanocomposite. ► SnO2/graphene nanocomposite as an anode for lithium-ion batteries. ► It exhibited high reversible specific capacity and excellent cycle capability. ► Graphene sheets can improve the cycling performance and reverible capacity of SnO2.