Lithiation Behaviour of Vanadium Molybdenum Oxides

Effects of structural modification caused by substitution of Mo for a part of V in V2O5 on structural changes upon lithium insertion were investigated. For this purpose (V1-yMoy)2O5 (y = 0.1, 0.25) was synthesized, and their insertion behaviours and structural changes upon lithium insertion were analysed by XRD and ESR methods. The oxide with y = 0.1 behaved like as V2O5, and irreversible phase change from δ- to γ-phase occurred at a larger litnium content of x by about 0.3. Reversible lithium insertion range was expanded by Mo substitution. The oxide with y = 0.25 did not have any evident structural changes at x< 1.5 in (V1-yMoy)2O5.