▎ 摘　　要

Over the past decade, TiO2/graphene composites as electrodes for lithium ion batteries have attracted a great deal of attention for reasons of safety and environmental friendliness. However, most of the TiO2/graphene electrodes have large graphene content (9-40 %), which is bound to increase the cost of the battery. Logically, reducing the amount of graphene is a necessary part to achieve a green battery. The synthesis of TiO2 nanosheets under solvothermal conditions without additives is now demonstrated. Through mechanical mixing TiO2 nanosheets with different amount of reduced graphene (rGO), a series of TiO2@graphene composites was prepared with low graphene content (rGO content 1, 2, 3, and 5 wt%). When these composites were evaluated as anodes for lithium ion batteries, it was found that TiO2+3 wt% rGO manifested excellent cycling stability and a high specific capacity (243.7 mAhg(-1) at 1 C; 1C= 167.5 mAg(-1)), and demonstrated superior high-rate discharge/charge capability at 20 C.