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A facile method to synthesize spherical LiNi0.8Co0.15Al0.05O2 cathode material

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Abstract

Spherical LiNi0.8Co0.15Al0.05O2 (LNCA) cathode material has been synthesized from a spherical Ni(OH)2 precursor by conventional solid-state synthesis and the effects of calcination temperature on crystal structure, particles morphology and electrochemical performance have been investigated. The reaction synthesis processed has been investigated by TG/DSC. X-ray diffraction (XRD) measurements show that samples annealed at 750 and 800 °C are pure hexagonal phase with well-defined layer structure. Scanning electron microscopy (SEM) result demonstrate that most LNCA particles inherited the spherical shape of Ni(OH)2. Crystal lattice fringe arranged along the (003) axis is found in transmission electron microscope (TEM) analysis. Electrochemical analysis demonstrates that among the investigated calcination temperature, a cell with LNCA sintered at 750 °C exhibits the best electrochemical properties with an initial discharge capacity of 194 mAh g−1 at 0.2 C and acceptable capacity retention of 85.2% after 100 cycles at 1 C. This work provides a new way to prepare spherical LiNi0.8Co0.15Al0.05O2 cathode material with acceptable electrochemical performances.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 51364021) and the Natural Science Foundation of Yunnan Province (2014FA025).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Zhenping Qiu

  2. National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Kunming, 650093, China

    Zhenping Qiu, Yingjie Zhang, Peng Dong & Shubiao Xia

  3. Yunnan Provincial Energy Research Institute Co., LTD, Kunming, 650093, China

    Mingyu Zhang

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  1. Zhenping Qiu
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  2. Yingjie Zhang
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  3. Mingyu Zhang
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  4. Peng Dong
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Correspondence to Yingjie Zhang.

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Qiu, Z., Zhang, Y., Zhang, M. et al. A facile method to synthesize spherical LiNi0.8Co0.15Al0.05O2 cathode material. J Mater Sci: Mater Electron 28, 18699–18705 (2017). https://doi.org/10.1007/s10854-017-7819-0

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  • DOI: https://doi.org/10.1007/s10854-017-7819-0

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