In situ chemical synthesis of SnO2-graphene nanocomposite as anode materials for lithium-ion batteries

摘要

An in situ chemical synthesis approach has been developed to prepare SnO2-graphene nanocomposite. Field emission scanning electron microscopy and transmission electron microscopy observation revealed the homogeneous distribution of SnO2 nanoparticles (4-6 nm in size) on graphene matrix. The electrochemical reactivities of the SnO2-graphene nanocomposite as anode material were measured by cyclic voltammetry and galvanostatic charge/discharge cycling. The as-synthesized SnO2-graphene nanocomposite exhibited a reversible lithium storage capacity of 765 mAh/g in the first cycle and an enhanced cyclability, which can be ascribed to 3D architecture of the SnO2-graphene nanocomposite.