▎ 摘　　要

Over the past decade, anatase phase titanium dioxide (TiO2) has attracted a great deal of attention as one of the most promising electrode materials for lithium ion batteries due to its safety, eco-friendliness, price and excellent properties such as high operating potential (similar to 1.75 V vs. Li/Li+), chemical and mechanical stability. This work presents an extensive study of the TiO2 micro particles-based electrode and the composites electrode of micro-TiO2 with nano-multilayered graphene. Graphene was synthesized from Sri Lankan natural graphite and was characterized using XRD, FTIR, Raman and SEM. The electrochemical performance of the electrodes prepared with anatase TiO2 micro particles and TiO2/graphene composites has been tested using constant current charge/discharge studies. TiO2 electrode shows a discharge capacity of 141.5 mAh g(-1) in the 1st cycle and that of 111.2 mAh g(-1) after 50 cycles with an initial irreversible capacity loss of 12.3% and a coulombic efficiency of 99.1%. TiO2-graphene composite electrode shows discharge capacities of 159.2 mAh g(-1), 143.0 mAh g(-1), 143.0 mAh g(-1) in 1st, 50th and 100th cycles, respectively with significantly small initial irreversible capacity loss of 6.5% and a coulombic efficiency of 99.5%. Moreover, this composite presents high material stability at high current rates and good cycle performance.