Preparation of vanadium oxides by solution processes and their electrochemical properties

Abstract

Several kinds of lithiated vanadium oxides were prepared by a solution process using lithium and vanadium alkoxides as starting materials. The products were characterized by the measurements of XRD, FT-IR, TG-DTA and TG-DTA/GC-MS, and their lithium insertion and deinsertion properties were also investigated. It is found that V₂O₅, β, γ-phases (having the formula Li_xV₂O₅), LiVO₃, and Li₃VO₄ can be prepared with an increase in the additional values of the lithium alkoxide. The potentials of the lithium insertion and deinsertion are found to be more than 0.5 V higher than that of α-V₂O₅ or γ-phase prepared by a solid state reaction.