Spray-drying synthesized LiNi_(0.6)Co_(0.2)Mn_(0.2)O2 and its electrochemical performance as cathode materials for lithium ion batteries

摘要

Layered LiNi_(0.6)Co_(0.2)Mn_(0.2)O2 materials were synthesized at different sintering temperatures using spray-drying precursor with molar ratio of Li/Me = 1.04 (Me = transition metals). The influences of sintering temperature on crystal structure, morphology and electrochemical performance of LiNi_(0.6)Co_(0.2)Mn_(0.2)O2 materials have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and charge-discharge test. As a result, material synthesized at 850 °C has excellent electrochemical performance, delivering an initial discharge capacity of 173.1 mAhg~(-1) between 2.8 and 4.3 Vatacurrent density of 16mAg~(-1) and exhibiting good cycling performance.