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Synthesis and electrochemical properties of nanosized carbon-coated Li1−3x La x FePO4 composites

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Abstract

Nanosized carbon-coated Li1−3x La x FePO4 composites were synthesized using a fast, easy, microwave assisted, room-temperature, solid-state method. A lanthanum precursor was used to improve the electronic conductivity of LiFePO4. The particle structure of the as-synthesized samples was observed using transmission electron microscopy. The results indicated that a uniform and continuous carbon layer was formed on the surface of Li1−3x La x FePO4 particles. Electrochemical techniques, such as cyclic voltammetry, charge/discharge test, and electrochemical impedance spectroscopy were used to investigate the electrochemical performance of the samples. The results of electrochemical measurements revealed that the carbon coating and lanthanum doping provided an initial discharge capacity of 145 mA h/g with excellent rate capacity and long cycling stability. These advantages, coupled with the low cost, the high thermal stability, and the environmental friendliness of the raw materials, render Li1−3x La x FePO4/C composites attractive for practical and large-scale applications.

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Acknowledgements

This work was supported by grants from the Natural Science Foundation of Xinjiang Province (Nos. 200821121 and 200721102) and the National Natural Science Foundation of China (Nos. 20666005 and 20661003).

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Authors and Affiliations

  1. Institute of Applied Chemistry, Xinjiang University, Urumqi, 830046, China

    Dan Li, Yudai Huang, Dianzeng Jia & Shu-Juan Bao

  2. Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, 2522, NSW, Australia

    Zaiping Guo

  3. School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, 2522, NSW, Australia

    Zaiping Guo

Authors
  1. Dan Li
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  2. Yudai Huang
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  3. Dianzeng Jia
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Correspondence to Dianzeng Jia.

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Li, D., Huang, Y., Jia, D. et al. Synthesis and electrochemical properties of nanosized carbon-coated Li1−3x La x FePO4 composites. J Solid State Electrochem 14, 889–895 (2010). https://doi.org/10.1007/s10008-009-0875-5

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  • DOI: https://doi.org/10.1007/s10008-009-0875-5

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