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Citation: WU Guan, ZHOU Ying-Ke. Preparation by Employing Mixed Lithium Source and Carbon Content Optimization of LiFePO4/C Materials[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(5): 850-856. doi: 10.11862/CJIC.2018.118 shu

Preparation by Employing Mixed Lithium Source and Carbon Content Optimization of LiFePO4/C Materials

  • State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

  • Corresponding author: ZHOU Ying-Ke, Zhouyingke@wust.edu.cn
  • Received Date: 19 December 2017
    Revised Date: 12 March 2018

Figures(8)

  • The LiFePO4/C composites have been successfully synthesized by adopted Li2CO3 and LiOH·H2O as mixed lithium source, the carbon content of the as-prepared LiFePO4/C materials have been optimized. Since the melting point of LiOH is lower than that of Li2CO3, adopt mixed lithium source can achieve better melting state at the same temperature, and favors the conductivity of lithium ions during the high temperature synthetic process to obtain pure LiFePO4 structure. The carbon content of LiFePO4/C composites were optimized to improve the electroconductivity and control the particle size. The LiFePO4/C cathode displayed excellent crystal structure, processability and electrochemical performances. The discharge capacity of the as-obtained LiFePO4/C composites is as high as 158.2 mAh·g-1, after 100 days storage, the capacity retention of full cells is still maintained higher than 94.0%, representing the superior long-term reliability of the optimized LiFePO4/C material.
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