Electrolytic V2O5, called e-V2O5, are prepared by electrochemical oxidation of aqueous solutions of vanadyl ions. By using various electrodeposition parameters (electrodeposition current density, temperature) or by subsequent heat treatment it is possible to obtain various compounds differing in their V-IV concentrations, water contents and interlayer distances. After dehydration at 100 degrees C under vacuum, the e-V2O5 compounds have the same water content and the same interlayer distance, but differ by their V-IV concentrations. Lithium insertion capacities depend on the V-IV content and on the annealing treatment at 180 degrees C. Materials with the smallest V-IV contents present the highest reversible capacities and good cycling properties.