Li0.33MnO2 was prepared by solid-state reaction of CMD oxide and a lithium salt. The structure was studied by X-ray diffraction and Raman scattering during electrochemical discharging. The possibility of application as a positive electrode inrechargeable lithium batteries was investigated. The electrochemical properties of Li//Li0.33MnO2 cells were studied as a function of temperature in the range 25-55 degrees C. The electrode material delivers an initial capacity of 194 mAh g(-1) and shows good reversibility at room temperature. Finally, the lithium insertion mechanism was examined by the determination of the ion kinetics. (c) 2006 Elsevier B.V. All rights reserved.