Enhancing the reversible capacity of nanostructured TiO₂(anatase) by Zr-doping using a sol–gel template method

Nanostructured Zr-doped (1 at.%) TiO₂(anatase) have been synthesized via a template sol–gel method on a carbon fiber. Scanning electron microscopy investigation shows that material consisted of microtubes (length of 10–300 μm, outer diameter of 3–5 μm) composed of nanoparticles with a size of 15–25 nm. The material was investigated as Li-ion battery anode. Zr-doped TiO₂ shows significantly higher reversible capacity (140 mA h g⁻¹) after 20-fold cycling at 0.1C-rate in the range 3–1 V in comparison with undoped titania (65 mA h g⁻¹)