Li1.1V0.9O2 (R (3) over barm) with a layered structure has been synthesized by a solid-state reaction of Li2CO3 and V2O3. The microstructure and morphology of the Li1.1V0.9O2 are characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical reversibility of Li1.1V0.9O2 electrode is examined at various charged and discharged states by means of differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR). The considerable improvement of the electrochemical performance of Li1.1V0.9O2 electrode is observed by changing the discharge cut-off potential from 1.0 to 2.0 V vs. Li/Li+. (C) 2009 Elsevier B.V. All rights reserved.