TiO2-B/anatase nanotubes doped by vanadium have been synthesized through a facile one-step hydrothermal reaction.The material shows a mesoporous structure with a specific surface area of 179.1 m2 g-1.XPS data presume the presence of V3+,V4+,V5+,and Ti3+ in doped TiO2-B/anatase.As found by XRD and EIS investigations,the vanadium expands bronze titania crystal structure and enhances the conductivity of material by three orders of magnitude.When tested for lithium storage,the V-modified titania nanotubes show a specific capacity of 133 mA h g-1 after 100 charge/discharge cycles at the current density of 3000 mA g-1 with a Coulombic efficiency of around 98.9％,resulting in its good cycleability.The material still possesses a reversible capacity of 114 mA h g-1 at a very high current load of 6000 mA g-1,demonstrating superior rate characteristics for secondary lithium batteries.Furthermore,V-doped TiO2-B/anatase mesoporous nanotubes show promise performance as anode material for sodium-ion batteries,delivering about 119 mA h g-1 and 101 mA h g-1 at the current loads of 10 and 1500 mA g-1,respectively.