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TixSn1-xO3 solid solution nanoparticles have been successfully prepared via a hydrothermal process. The morphology and structure of TiO2, SnO2 and TixSn1-xO3 solid solution nanoparticles were investigated by scanning electron microscopy, transmission electron microscope and X-ray diffraction measurements. The electrochemical performance of TiO2, SnO2 and TixSn1-xO3 solid solution nanoparticles as anode material for lithium-ion batteries were systematically investigated by a variety of electrochemical testing techniques. The TixSn1-xO3 solid solution nanoparticles showed not only higher specific capacity of 401.3 mA h·g1 after 50 cycles but also better cycle performance, superior than the pure SnO2 electrode, which can be ascribed to the stable cyclability of TiO2 and the high reversible capacity of nanosized SnO2.

The single crystalline V2O5 nanowire/graphene nanosheets (GNS) composite has been successfully prepared via an easy and facile one-step hydrothermal synthesis method. The morphology, structure and electrochemical performance of V2O5 nanowire/GNS composite as cathode material for lithium-ion batteries were systematically investigated by transmission electron microscope, X-ray diffraction and a variety of electrochemical testing techniques. The V2O5 single crystalline nanowires were supported on the GNS substrate and exhibited excellent electrochemical properties. When used as a cathode material of lithium-ion batteries, the composite material revealed high initial discharge capacities and exceptional rate capacities. It was found that V2O5 nanowire/GNS composite exhibited a relatively high reversible capacity of 357 mA h g-1 and fine cycle performance.