J. Mater. Sci. Technol. ›› 2020, Vol. 54: 181-189.DOI: 10.1016/j.jmst.2020.02.068

• Research Article • Previous Articles     Next Articles

Vanadium-doped TiO2-B/anatase mesoporous nanotubes with improved rate and cycle performance for rechargeable lithium and sodium batteries

D.P. Opraa,*(), S.V. Gnedenkova, A.A. Sokolova,b, A.B. Podgorbunskya, A.Yu. Ustinova,b, V.Yu. Mayorova, V.G. Kuryavyia, S.L. Sinebryukhova   

  1. a Institute of Chemistry FEB RAS, 159, Pr. 100-letiya Vladivostoka, Vladivostok 690022, Russia
    b Far Eastern Federal University, 8, St. Sukhanova, Vladivostok 690950, Russia
  • Received:2019-11-10 Revised:2020-01-12 Accepted:2020-02-04 Published:2020-10-01 Online:2020-10-21
  • Contact: D.P. Opra

Abstract:

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.

Key words: Lithium-ion battery, Sodium-ion battery, Anode, TiO2-B Anatase, Doping, Nanotubes, Mesoporosity