GRAPHENE-SnO_2 NANOCOMPOSITES FOR LITHIUM-ION BATTERY ANODES

摘要

Graphene-SnO_2 nanocomposites were synthesized in a facile one-step microwave-assisted reduction of graphene oxide (GO) with Sn~(2+) ions in aqueous medium. The synthesis is chemically controlled (reduction of GO and concomitant oxidation of Sn~(2+)), which leads to a homogeneous distribution of SnO_2 nanoparticles on graphene nano-platelets. The structure and composition of the obtained composite material was thoroughly investigated by electron microscopy (SEM and TEM), X-ray diffraction analysis and FT-IR spectroscopy. Electrochemical investigations showed that the material exhibited enhanced performance as anode material for lithium ion batteries due to the higher conductivity of the composite and the structure-stabilizing effect of graphene.