In situ synthesis of SnO2 nanosheet/graphene composite as anode materials for lithium-ion batteries

Abstract

A novel SnO2/graphene composite has been synthesized via an in situ chemical synthesis method, in which single crystal SnO2 nanosheets are uniformly grown on graphene support. The as-prepared products were characterized by X-ray diffraction, field emission scanning electron microscope, transmission electron microscope, Thermogravimetric analyses and Nitrogen adsorption/desorption. When used as an anode material for lithium ion batteries, the SnO2/graphene composite exhibits an enhanced reversible lithium storage capacity and good cyclic performance. The first discharge and charge capacities are 1,366 and 975 mAh g−1, respectively. After 100 cycles, the reversible discharge capacity is still maintained at 451 mAh g−1 at the current densities of 100 mA g−1, indicating that it’s a promising anode material for high performance lithium ion batteries.