Synthesis of xLi2MnO3·(1−x)LiMO2 (M=Cr, Mn, Co, Ni) nanocomposites and their electrochemical properties

Abstract A series of 0.4Li 2 MnO 3 ·0.6LiMO 2 (M = Ni 1/3 Co 1/3 Mn 1/3 and Ni 1/3 Cr 1/3 Mn 1/3 ) cathode materials are prepared by a co-precipitation method with subsequent quenching. Crystal structures of samples are investigated by X-ray diffraction and electron diffraction, which show a co-existence of rhombohedral and monoclinic structures indicating nanocomposite characteristics of the sample of 0.4Li 2 MnO 3 ·0.6Li Ni 1/3 Cr 1/3 Mn 1/3 O 2 . The average particle size distributions of the powders are analyzed to be an order 400 and 100 nm. The 0.4Li 2 MnO 3 ·0.6LiMO 2 (M = Ni 1/3 Co 1/3 Mn 1/3 and Ni 1/3 Cr 1/3 Mn 1/3 ) electrodes, which consist of a well balanced partial phases of rhombohedral and monoclinic can deliver a high reversible capacity of 220–230 mAh/g during an extended cycling.