Structural and electrochemical characterization of Li1.2Ni x Co x Mn0.8-aEuroparts per thousand2x O2 (x=0.128, 0.16, and 0.2) as cathode materials for lithium-ion batteries

Li1.2Ni (x) Co (x) Mn0.8 -aEuro parts per thousand 2x O-2 (x = 0.128, 0.16, and 0.2) cathode materials have been synthesized by a simple carbonate precipitation method followed by high-temperature calcination. The effects of the transition metal content on the structure, physical property, and electrochemical performance of the samples have been investigated. As the manganese content increases, we observed not only a well-ordered layered structure and uniform morphology but also remarkable improvements in capacity and better cycling properties.