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Facile synthesis and electrochemical performance of LiFePO4/C based on modified ferrous phosphate microspheres

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Abstract

This paper reported a novel approach to synthesize the uniform carbon-coated LiFePO4/C with PAM composite micro-spherical ferrous phosphate which was produced by the co-precipitation method as the precursor. The addition of PAM effectively controlled the ferrous phosphate primary particle size around 200 nm, and the corresponding LiFePO4/C particle size has also been restricted which effectively shortens the transport distance of lithium ions. In addition, the resulting PAM-embedded ferrous phosphate precursor gave high conductivity of LiFePO4/C, and more carbon residue leads to better rate performance. The LiFePO4-PAM sample demonstrated excellent electrochemical performance of initial discharge capacities at 0.2, 0.5, 1, 2, and 5C are 163.3, 160.5, 155.3, 146.2, and 126.3 mAh g-1, respectively. Furthermore, the initial charge and discharge capacity of synthesized LiFePO4 with different PAM addition amounts was also studied.

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Funding

The authors are grateful to the Tianjin Technical Expert Project (grant number 19JCTPJC43900) for the financial support to this work.

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Authors and Affiliations

  1. Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin, 300130, China

    Yong Wang, Shiyu Tian & Guangchuan Liang

  2. Shandong Goldencell Electronics Technology Co., Ltd, Zaozhuang, Shandong, 277800, People’s Republic of China

    Yong Wang, Jingpeng Zhang & Juanjuan Xue

  3. Automobile & Rail Transportation School, Tianjin Sino-German University of Applied Sciences, Tianjin, 300350, China

    Lizhi Wen

  4. Key Laboratory of Special Functional Materials for Ecological Environment and Information (Hebei University of Technology), Ministry of Education, Tianjin, 300130, China

    Guangchuan Liang

  5. Key Laboratory for New Type of Functional Materials in Hebei Province, Hebei University of Technology, Tianjin, 300130, China

    Guangchuan Liang

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  1. Yong Wang
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Correspondence to Guangchuan Liang.

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Wang, Y., Zhang, J., Tian, S. et al. Facile synthesis and electrochemical performance of LiFePO4/C based on modified ferrous phosphate microspheres. Ionics 27, 993–1002 (2021). https://doi.org/10.1007/s11581-020-03881-2

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