Lithiation behaviour of vanadium molybdenum oxides

Effects of structural modification caused by substitution of Mo for a Dart of V in V2O5 on structural changes upon lithium insertion were investigated . For this purpose (V1-yMOy)(2)O-5 (y = 0.1, 0.25) was synthesized, and the ir insertion behaviours and structural changes upon lithium insertion were analysed by XRD and ESR methods. The oxide with y = 0.1 behaved like as V2O 5, and irreversible phase change from delta- to gamma-phase occurred at a l arger 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)(2)O-5.