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 by their V⁴⁺ concentrations, water contents and interlayer distances.
 
 

After dehydration at 100°C under vacuum, the e-V₂O₅ compounds have the same water content and the same interlayer distance, but differ by their V⁴⁺ concentrations. Lithium insertion capacities depend on the V⁴⁺ content and on the annealing treatment at 180°C. Non heat treated materials with the smallest V⁴⁺ contents present the highest capacities and good cycling properties.
 
 

Keywords: Vanadium pentoxyde, electrodeposition, physico-chemical characterization, electrochemical lithium intercalation.