▎ 摘　　要

To improve the electrochemical kinetics and alleviate the structural collapse of TiO2 in the process of charge/discharge, TiO2 nanotubes (TiO2NT) anchored on a large-area graphitic carbon nitride/reduced graphene oxide (g-C3N4/RGO) hybrid nanosheets have been designed by alkaline hydrothermal method. This unique architecture ensures the uniform distribution of TiO2NT and inhibits the natural tendency to agglomeration of RGO to a large extent. When applied as anode material for Na-ion batteries (NIBs), the resultant sample delivers high reversible capacities of 138.5 mAh g(-1) after 244 cycles at 0.1 A g(-1) and good rate capability (103.3 mAh g(-1) at 0.8 A g(-1) ). These excellent sodium storage behaviors are attributed to the double coating effect of g-C3N4/RGO nanosheets on TiO2 nanotubes, which can reduce the volume change in the cycle. Therefore, TiO2 nanotubes/ graphite phase carbon nitride/graphene composite (TiO2NT/g-C(3)N4 /RGO) should be a promising and attractive NIBs anode material.