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Preparation and electrochemical properties of nanoparticle structural LiFePO4/C by Sol–Gel method as cathode material for lithium ion batteries

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Abstract

In this study, LiFePO4/C nanocomposites with higher capacity and cycle performance are synthesized by sol–gel method using FeCl2·4H2O, H3PO4, Li2CO3, and Citric acid as the starting materials. LiFePO4/C cathode materials with different grain size and electrochemical properties were obtained by changing the calcination temperature of LiFePO4/C precursor prepared by sol–gel method. Specially, the LiFePO4/C precursor prepared by sol–gel method was heated to 700 °C for 12 h under nitrogen atmosphere, and the nanoparticle structural LiFePO4/C was obtained. The first discharge specific capacity is 156.5 mAh g−1 at a charging current of 0.2 C. The first discharge specific capacity is 124.5 mAh g−1 at a charging current of 1 C, and after the 250th cycles, the discharge specific capacity is 120.7 mAh g−1, the retention rate of discharge specific capacity is 96.9%.

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Acknowledgements

This work was supported by National International Technology Cooperation Plan (Grant No. 2014DFR50570).

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Authors and Affiliations

  1. Laboratory of Environment Functional Materials of Tangshan City, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan, 063210, Hebei, China

    Zongfeng Li, Guixia Dong, Jingrui Kang & Lei Li

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  2. Guixia Dong
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Correspondence to Guixia Dong.

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Li, Z., Dong, G., Kang, J. et al. Preparation and electrochemical properties of nanoparticle structural LiFePO4/C by Sol–Gel method as cathode material for lithium ion batteries. J Mater Sci: Mater Electron 30, 6593–6600 (2019). https://doi.org/10.1007/s10854-019-00966-1

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