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

Abstract A novel perovskite CoTiO 3 /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 CoTiO 3 /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 CoTiO 3 /graphene nanocomposite delivers a higher stable discharge capacity (∼500 mAh g −1 ) and better cycling stability (86.2%), as well as improved rate capability over 80 cycles, compared with those of bare CoTiO 3 . Moreover, this CoTiO 3 /graphene nanocomposite exhibits stable discharge capacity (∼350 mAh g −1 ) after 3000 cycles at high current density (1 A g −1 ). The improved electrochemical properties of CoTiO 3 /graphene can be attributed to the good conductivity and large surface of graphene and the combination novel nanostructure of CoTiO 3 and graphene.