Facile Synthesis of Platelike Hierarchical Li1.2Mn0.54Ni0.13Co0.13O2with Exposed {010} Planes for High-Rate and Long Cycling-Stable Lithium Ion Batteries

Lithium-rich layered oxides are promising cathode candidates for the production of high-energy and high-power electronic devices with high specific capacity and high discharge voltage. However, unstable cycling performance, especially at high charge–recharge rate, is the most challenge issue which needs to be solved to foster the diffusion of these materials. In this paper, hierarchical platelike Li1.2Mn0.54Ni0.13Co0.13O2cathode materials were synthesized by a facile solvothermal method followed by calcination. Calcination time was found to be a key parameter to obtain pure layered oxide phase and tailor its hierarchical morphology. The Li-rich material consists of primary nanoparticles with exposed {010} planes assembled to form platelike layers which exhibit low resistance to Li+diffusion. In detail, the product by calcination at 900 °C for 12 h exhibits specific capacity of 228, 218, and 204 mA h g–1at 200, 400, and 1000 mA g–1, respectively, whereas after 100 cycles at 1000 mA g–1rate of charge and recharge the specific capacity was retained by about 91%.