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Effect of synthesis temperature and molar ratio of organic lithium salts on the properties and electrochemical performance of LiFePO4/C composites

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Abstract

LiFePO4/C cathode materials were synthesized through in situ solid-state reaction route using Fe2O3, NH4H2PO4, Li2C2O4, and lithium polyacrylate as raw materials. The precursor of LiFePO4/C was investigated by thermogravimetric/differential thermal analysis. The effects of synthesis temperature and molar ratio of organic lithium salts on the performance of samples were characterized by X-ray diffraction, scanning electron microscopy, electrochemical impedance spectra, cyclic voltammogram, and constant current charge/discharge test. The sample prepared at optimized conditions of synthesis temperature at 700 °C and molar ratio with 1.17:1 exhibits excellent rate performance and cycling stability at room temperature.

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Authors and Affiliations

  1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, Sichuan, 610041, People’s Republic of China

    Zhongqi Shi, Ming Huang, Kerun Yang, Bin Tan, Xinglan Huang & Zhenghua Deng

  2. Graduate School of Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China

    Zhongqi Shi, Ming Huang, Kerun Yang, Bin Tan, Xinglan Huang & Zhenghua Deng

  3. Department of Chemistry and Materials, Sichuan Normal University, Chengdu, Sichuan, 610068, People’s Republic of China

    Xuebu Hu

  4. Zhongke Laifang Power Science & Technology Co., Ltd, Chengdu, Sichuan, 610041, People’s Republic of China

    Xuebu Hu & Zhenghua Deng

Authors
  1. Zhongqi Shi
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  2. Ming Huang
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  3. Kerun Yang
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  4. Xuebu Hu
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  5. Bin Tan
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  6. Xinglan Huang
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  7. Zhenghua Deng
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Correspondence to Zhenghua Deng.

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Shi, Z., Huang, M., Yang, K. et al. Effect of synthesis temperature and molar ratio of organic lithium salts on the properties and electrochemical performance of LiFePO4/C composites. J Solid State Electrochem 16, 811–818 (2012). https://doi.org/10.1007/s10008-011-1433-5

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  • DOI: https://doi.org/10.1007/s10008-011-1433-5

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