Preparation of TiO2/Co3O4 Nanostructured Materials by a Two-Step Hydrothermal Method and their Electrode Performance in Lithium Ion Batteries

In order to increase the cycling performance and reversible capacity of Co 3 O 4 electrode materials, TiO 2 /Co 3 O 4 anode materials were prepared by a two-step hydrothermal method. The phase composition, structure and morphology of the TiO 2 /Co 3 O 4 anode materials were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The electrode performance of the materials was tested by a battery discharge and charge tester and an electrochemical workstation. The results shows that the TiO 2 /Co 3 O 4 nanostructured materials consist of a new type of nest-like nanostructure, formed by an external mechanical force. A single nest-like TiO 2 /Co 3 O 4 nanostructure is composed of the monoclinic TiO 2 -B and cubic Co 3 O 4 phases. The nanostructured materials have excellent electrochemical performance, with a capacity of 650 mAh/g and a current density of 33.5 mA/g after 100 cycles.