TiO2nanotubes wrapped with reduced graphene oxide as a high-performance anode material for lithium-ion batteries.
Through electrostatic interaction and high-temperature reduction methods, rGO was closely coated onto the surface of TiO2nanotubes. Even at a high temperature of 700 °C, the nanotube morphology of TiO2(anatase) was preserved because of the assistance of rGO, which provides a framework that prevents the tubes from breaking into particles and undergoing a phase transformation. The rGO/TiO2nanotubes deliver a high capacity (263 mAh g-1at the end of 100 cycles at 0.1 A g-1), excellent rate performance (151 mAh g-1at 2 A g-1and 102 mAh g-1at 5 A g-1), and good cycle stability (206 mAh g-1after 500 cycles at 0.5 A g-1). These characteristics arise from the GO/TiO2nanotubes' advanced structure. First, the closely coated rGO and Ti3+in the tubes give rise to a high electro-conductivity of the nanotubes. Additionally, the Li+ions can rapidly transfer into the electrode via the nanotubes' empty inner diameter and short tube wall.
School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xian 710021, Shaanxi, P. R. China.
Peng
P
Zheng
School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xian 710021, Shaanxi, P. R. China.
Ting
T
Liu
School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xian 710021, Shaanxi, P. R. China.
Ying
Y
Su
School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xian 710021, Shaanxi, P. R. China.
Lifeng
L
Zhang
School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xian 710021, Shaanxi, P. R. China.|Department of Electronic Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
Shouwu
S
Guo