Impedance spectroscopy study of lithium ion diffusion in a new cathode material based on vanadium pentoxide

The high discharge capacity (ca. 380 mAh g−1 in the first cycle) and diffusion coefficients of Li+ ranging from ∼10−10 to ∼10−9 cm2 s−1 were estimated from electrochemical experiments for the new composite material based on vanadium pentoxide xerogel and carbon nanotubes synthesized using freeze-drying technology demonstrating that it can be used in cathodes for advanced lithium-ion batteries.