Preparation and Electrochemical Properties of Nanometer-Sized Li₂TiO₃-LiCrO₂ Nanocomposite Cathode Powders by Spray Pyrolysis

摘要

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