Synthesis of LiNi0.6Co0.2Mn0.2O2 cathode material by a carbonate co-precipitation method and its electrochemical characterization |
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| Institution: | 1. Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Ave., Argonne, IL 60439, USA;2. Qatar Environment and Energy Research Institute, Qatar Foundation, P.O. Box 5825, Doha, Qatar;3. State University of New York at Binghamton, Binghamton, NY 13902, USA;1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China;2. School of Applied Chemistry and Engineering, University of Science and Technology of China (USTC), Hefei 230026, PR China;1. School of Metallurgy and Environment, Central South University, Changsha 410083, PR China;2. Citic Dameng Mining Industries Limited, Nanning 530028, PR China |
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| Abstract: | Using Na2CO3 and Me(NO3)2 (Me = Ni, Co and Mn) as starting materials, the precursor of LiNi0.6Co0.2Mn0.2O2 cathode material for lithium rechargeable batteries has been synthesized by carbonate co-precipitation. The precursor was mixed with Li2CO3 and heated in air. Thermogravimetric analysis (TG–DTA), laser particle size analysis, X-ray diffraction (XRD) and electron scanning microscopy (SEM) were employed to study the reaction process and the structures of the powders. The D50 of precursor was 2.509 μm and the distribution was relatively narrow. The optimum calcination temperature was 850–900 °C. Galvanostatic cell cycling and cyclic voltammetry were also used to evaluate the electrochemical properties. The initial discharge capacity for the powders calcined at 900 °C was about 180 mA h/g at room temperature when cycled between 2.8 and 4.3 V at 0.2 C rate. |
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