▎ 摘 要
TiO2 nanorods uniformly distributed on reduced graphene oxide (rGO) were successfully synthesized via a facile sol-static self-assembled method followed by an alkali-heat treatment. The flexible rGO nanosheets can not only serve as the electric matrix to increase the conductivity of composite, but also offer large active area between the electrode material and electrolyte to facilitate electrolyte permeability and shortened distance for lithium ion diffusion and electron transfer. Detailed analysis on electrochemical kinetics manifests that the increased diffusion coefficiency and capacitive behaviors during the charging/discharging processes lead to fast insertion/extraction of lithium ions in the obtained TiO2 nanorods/rGO composite (TNGC). Consequently, the as-obtained TNGC exhibited a good electrochemical performance with a high cyclic stability (353.6 mA h g(-1) after 100 cycles at a current density of 0.1 A g(-1)) and outstanding rate capacity (205.1 mA h g(-1) at a current density of 2 A g(-1)) as lithium ion batteries anode material. (C) 2018 Elsevier B.V. All rights reserved.