Ternary perovskite cobalt titanate/graphene composite material as long-term cyclic anode for lithium-ion battery

A novel perovskite CoTiO3/graphene composite with a particle size of 100 nm was synthesized by ball milling and high temperature solid method and utilized as anode materials for lithium-ion batteries. The structure morphology and electrochemical performance of CoTiO3/graphene nanocomposite were investigated by X-ray diffraction (XRD), Raman spectroscopy measurements, scanning electron microscopy (SEM), galvanostatic charge-discharge tests and electrochemical impedance spectroscopy (EIS) tests. The CoTiO3/graphene nanocomposite delivers a higher stable discharge capacity (similar to 500 mAh g(-1)) and better cycling stability (86.2%), as well as improved rate capability over 80 cycles, compared with those of bare CoTiO3. Moreover, this CoTiO3/graphene nanocomposite exhibits stable discharge capacity (similar to 350 mAh g(-1)) after 3000 cycles at high current density (1 A g(-1)). The improved electrochemical properties of CoTiO3/graphene can be attributed to the good conductivity and large surface of graphene and the combination novel nanostructure of CoTiO3 and graphene. (C) 2017 Elsevier B.V. All rights reserved.