Synthesis and electrochemical performance of LiNi0.6Co0.2Mn0.2O2 as a concentration-gradient cathode material for lithium batteries |
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Authors: | Long-Wei Liang Ke Du Zhong-Dong Peng Yan-Bing Cao Guo-Rong Hu |
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Affiliation: | School of Metallurgy and Environment, Central South University, Changsha 410083, China |
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Abstract: | Awell-ordered and spherical LiNi0.6Co0.2Mn0.2O2 cathode material was successfully synthesized from Ni and Mn concentration-gradient precursors via co-precipitation. The crystal structure, morphology and electrochemical properties of LiNi0.6Co0.2Mn0.2O2 were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, and charge-discharge tests. The material delivered an initial discharge capacity of 174.3 mAh/g at 180 mA/g (1 C rate) between 2.8 and 4.3 V and more than 93.1% of that was retained after 100 cycles. In addition, it also exhibited excellent rate capability, high cut-off voltage and temperature performance. |
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Keywords: | Lithium secondary batterie sLiNi0.6Co0.2Mn0.2O2 Concentration-gradient Electrochemical performance |
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