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Electrochemical characterization of AlPO4 coated LiNi1/3Co1/3Mn1/3O2 cathode materials for high temperature lithium battery application

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Abstract

Aluminum phosphate (AlPO4) was used to modify the surface of LiNi1/3Co1/3Mn1/3O2 (NCM) cathode material. The surface structure and electrochemical properties of the coated materials were investigated by X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). The results confirm the formation of aluminum-containing solid solution on the surface of NCM particles. An aluminum phosphate coating blocks the Li+ insertion-extraction process in cells charged at high rates at room temperature, increasing surface film resistance and decreasing discharge capacity. However, an aluminum phosphate aids the formation of a stable solid electrolyte interface film on NCM surface and stabilizes the R ct of cell as samples electrochemically cycled at 55 °C. The electrochemical studies suggest that the initial columbic efficiency is significantly enhanced. An NCM sample coated with 1.0 wt% AlPO4 delivers a higher discharge capacity and shows excellent capacity retention ability.

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Acknowledgments

This study was financially supported by the National Natural Science Foundation of China (No. U1202272) and University Project of Kunming University of Science and Technology (No. KKZ4200730010).

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Authors and Affiliations

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

    Yu Wang, Yu-Zhong Guo, Chang-Wei Liu & Lu-Lu Dan

  2. Research Center for Analysis and Measure, Kunming University of Science and Technology, Kunming, 650093, China

    Jian-Hua Wang

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  1. Jian-Hua Wang
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  2. Yu Wang
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Correspondence to Yu-Zhong Guo.

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Wang, JH., Wang, Y., Guo, YZ. et al. Electrochemical characterization of AlPO4 coated LiNi1/3Co1/3Mn1/3O2 cathode materials for high temperature lithium battery application. Rare Met. 40, 78–83 (2021). https://doi.org/10.1007/s12598-014-0247-x

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  • DOI: https://doi.org/10.1007/s12598-014-0247-x

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