▎ 摘　　要

A facile method to prepare the MnO2-graphene composite was proposed. The composite with a sandwich structure was synthesized by oxidizing part of the carbon atoms in the framework of graphene. By using graphene as buffer carrier, MnO2 was homogeneously coated onto the surface of graphene. Electrochemical properties of this MnO2-graphene composite were characterized and it exhibits excellent cyclic stability and good rate properties. The MnO2-graphene electrode retains a capacity of 752 mA h g(-1) at a current density of 100 mA g(-1) after 65 cycles, making it a promising anode material for lithium ion batteries.