nanotubes

Sodium trititanate, Na2Ti3O7, is considered to be a promising material for the negative electrode of reliable sodium-ion batteries. The advantages of Na2Ti3O7 include suitable electrode potential and cycling stability. However, this material is characterized by the limited specific capacity and low electronic conductivity. The current work is devoted to modification of Na2Ti3O7 by combining it with the high-capacity α-Fe2O3 phase.

Nanotubes of bronze titanium dioxide (TiO₂(B)) doped with vanadium were synthesized through hydrothermal reaction. The obtained material possesses mesoporous structure and large specific surface area of 180 m²/g. It was found that the incorporation of vanadium into TiO₂(B) lattice increases the volume of a unit cell. Additionally, the conductivity rose up to three orders of magnitude for doped titanium dioxide reaching the value of 1.70 ? 10 ^{? 8} S/cm.