Fabrication of Ti-doped SnO2/RGO composites as anode materials with high stability for lithium-ion batteries

The electrochemical performance of lithium-ion batteries are affected by the anode materials. SnO2 is an important anode material due to its high theoretical specific capacity of about 783 mAh/g for next-generation lithium-ion batteries with a higher energy density. In this work, we combined the electrochemical advantages of graphene and TiO2, and the Ti-doped composites of SnO2/reduced graphene oxide as the anode materials were fabricated by a hydrothermal method. To analyze the structure and electrochemical properties, a series of characterizations including X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and electrochemical measurements were performed. The results confirmed that Ti atoms effectively replaced Sn atoms, improving the long-term cycling stability, which exhibited a superior rate capability and maintained a high discharge capacity around 500 mAh/g after 200 cycles.