To improve the electrochemical performance of TiO2 nanotube as anode materials in Li-ion batteries, N-doped TiO2 nanotube/N-doped graphene composites were prepared via hydrothermal synthesis followed by heat-treatment in presence of urea. The N doped TiO2 nanotubes/N-doped graphene composites were characterized by X-ray powder diffraction, transition electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. The electrochemical experiments demonstrated that as prepared sample exhibit superior discharge capacity (up to 369mAh g-1 at 0.1Ag-1) as well as excellent rate ability (90 mAh g-1 even at 5 A g-1 at 180th cycle) as anode materials in lithium-ion batteries. J. Mater. Chem. A, 2014 SEM images of TiO2 nanotube,(A) TiO2 nanotube/graphene composites (B) and (C) N-doped TiO2 /Ndoped graphene nanosheets composites at low magnification (C) and at high magnification (D) TEM images of TiO2 nanotube/graphene composites (A) at low magnification and (B) at high magnification, Ndoped TiO2 nanotubes/graphene composites (C) at low magnification and (D) at high magnification |
