Preparation and electrochemical properties of nanometer-sized Li₂TiO₃-LiCrO₂ nanocomposite cathode powders by spray pyrolysis

The nanometer-sized Li₂TiO₃-LiCrO₂ nanocomposite cathode powders are prepared by spray pyrolysis. The existence of Li2CrO4 glass material during post-treatment is essential to prepare the nanometer-sized Li₂TiO₃-LiCrO₂ nanocomposite powders. The Li₂TiO₃-LiCrO₂ nanocomposite powders washed with distilled water have the mixed crystal structure of the rhombohedral LiCrO₂ and the monoclinic Li₂TiO₃ without impurity. The mean size of the nanocomposite powders post-treated at750°C is 130 nm. The initial charge and discharge capacities of the nanocomposite powders post-treated at750°C are 303 and 195 mAh g^-1, respectively. The capacity retention of the nanocomposite powders post-treated at 750°C is 88% after 30cycles.