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Effects of nickel source on the electrochemical performance of ternary cathode material 622

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Abstract

Due to uneven mixing, LiNi0.6Co0.2Mn0.2O2 (NCM622) electrode material prepared by high temperature solid phase method usually had high cationic mixing degree, which could greatly affect the NCM622 electrode material electrochemical performance. In order to solve this problem, a series of NCM622 electrode materials with different electrochemical performance were prepared by using different nickel sources under the same high temperature solid phase conditions. X-ray diffraction and scanning electron microscopy were used to characterize the electrode materials’ morphology and structure. The electrochemical performance of the obtained NCM622 electrode materials, including capacity performance, rate performance, cycle performance, cyclic voltammetry, and AC impedance, was also characterized. The results showed that when the nanoscale NiO obtained with the aid of organic matter was used as the nickel source, high-performance NCM622 cathode material could be prepared without element doping and material coating under the solid phase conditions (900.0 °C for 10 h). At a voltage of 2.8–4.3 V, the discharge specific capacity at 0.1 C could reach a maximum of 197.5 mAh·g−1. And at 0.5 C, after 100 cycles (half-cell condition), the NCM622 material had a discharge capacity retention rate of 95.0%.

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The data that support the findings of this study are available on request from the corresponding author, upon reasonable request.

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Acknowledgements

The work was supported by the National Natural Science Foundation of China (51602266), Sichuan Province Key R&D Project (2021YFG0216), Sichuan Provincial Central Leading Local Science and Technology Development Project (2021ZYD0066), Chengdu Technology Innovation R&D Project (2022-YF05-00320-SN), and Fundamental Research Funds for the Central Universities (2682020ZT83).

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Authors and Affiliations

  1. Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle (Ministry of Education), Institute of Biomedical Engineering, School of Electrical Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Liu Peisong, Yang Weitong, Hu Lei, Yang Xiaoxiao, Lu Xiaoying & Jiang Qi

  2. Narada Huatuo New Energy Technology Co., LTD, Anhui, 236000, China

    Liu Peisong

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  1. Liu Peisong
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  2. Yang Weitong
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  3. Hu Lei
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  4. Yang Xiaoxiao
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  5. Lu Xiaoying
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  6. Jiang Qi
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Contributions

LP contributed toward methodology, formal analysis, and writing—original draft;  YW contributed toward methodology and writing—review and editing;  HL contributed toward writing—review and editing;  YX contributed toward writing—review and editing; LX contributed toward writing—review and editing and funding acquisition; and JQ contributed toward conceptualization, resources, and writing—review and editing.

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Correspondence to Lu Xiaoying or Jiang Qi.

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The authors declared that they have no conflicts of interest to this work. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.

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Peisong, L., Weitong, Y., Lei, H. et al. Effects of nickel source on the electrochemical performance of ternary cathode material 622. J Mater Sci: Mater Electron 34, 2179 (2023). https://doi.org/10.1007/s10854-023-11571-8

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