Effect of Crystallinity on Electrochemical Insertion/Extraction of Li in Transition Metal Oxides Part Ⅱ: TiO2, V2O5 and MoO3

Electrochemical insertion/extraction of Li on cathode materials of anatase type TiO2, quasilayered structure V2O5 and layered structure MoO3 was measured on samples of which structures were well characterized and showed a wide range of crystallinity. On the basis of experimental results on structure, morphology and charge-discharge characteristics, the effect of crystallinity of the cathode materials on electrochemical Li insertion/extraction pedermance was discussed. These three transition metal oxides were classified as one group on the basis of whether the crystallinity of these oxides affects to the performance or not; LiMn2O4 and LiCo0.5O2 belongs to the former group and TiO2, V2O5 and MoO3 to the latter.