Abstract
Nickel-rich layered oxide LiNi0.8Co0.1Mn0.1O2 suffers from severe structural instability and irreversible capacity loss during cycling due to cation disorder of Li+ and Ni2+. To solve this problem, the precursor Ni0.8Co0.1Mn0.1(OH)2 and well-ordered LiNi0.8Co0.1Mn0.1O2 cathode materials were successfully synthesized via controlled crystallization and high-temperature solid-state methods. The structure, morphology, and electrochemical performance of the precursor and LiNi0.8Co0.1Mn0.1O2 powders were investigated. The results show that the precursor Ni0.8Co0.1Mn0.1(OH)2 is made of sphere-like particles composed of needle-like primary crystal and LiNi0.8Co0.1Mn0.1O2 possesses a perfect layered structure with low Li/Ni disorder. Electrochemical data demonstrate that the material rate capabilities are 203.3, 187.7, 170.4, and 163 mA h/g from 0.1C to 10C, respectively. The capacity retention is 87.9% after 100 cycles at 1C, even the cut-off voltage was increased to 4.5 V. The high discharge capacity and outstanding cycling life can be attributed to the merits of a perfect crystal lattice with low Li/Ni disorder, fast lithium ion transport, and relatively low charge transfer resistance.
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This work is supported by the Key Research and Development Plan of Shandong Province (2017CXGC0502 and 2019GGX103038) and the International Science and Technology Cooperation Project of Shandong Academy of Sciences (2019GHPY17).
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Yang, G., Qin, X., Wang, B. et al. Well-ordered spherical LiNi0.8Co0.1Mn0.1O2 cathode material for lithium-ion batteries. Journal of Materials Research 35, 51–57 (2020). https://doi.org/10.1557/jmr.2019.307
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DOI: https://doi.org/10.1557/jmr.2019.307