Low-temperature preparation of lithium vanadium oxides by solution processing

Lithium vanadium (Li-V) oxides were prepared by solution processing using the reaction of an aqueous hydrogen peroxide solution with lithium and vanadium alkoxides, LiO-n-C3H7 and VO(O-i-C3H7)(3). It was found that various phases of the Li-V oxides such as the orthorhombic 2D-V2O5 compound, and the beta- and gamma-phases having the general formula of LixV2O5 (0 less than or equal to x < 2.2) are obtained at low temperature such as similar to300degreesC. Particularly, it should be noted that gamma-LixV2O5 can be prepared as a single phase in the x range of 1.3-2.2. The charge and discharge behavior for the gamma-phase material (x=2.2) is discussed as compared to that of the gamma-phase material (x = 1) prepared by conventional high temperature solid-state reaction. (C) 2003 Elsevier Ltd. All rights reserved.