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SYNTHESIS AND CHARACTERIZATION OFLiFePO4/CPREPARED VIA A SOL–GEL METHOD

Author

Listed:
  • YAN LIN

    (Department of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China)

  • HONGGE PAN

    (Department of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China)

  • MINGXIA GAO

    (Department of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China)

  • HE MIAO

    (Department of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China)

  • SHOUQUAN LI

    (Department of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China)

  • YUE WANG

    (Department of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China)

Abstract

Carbon-coated lithium ion phosphate was synthesized from a gel precursor with ferric iron and a carbon source of organic chelating agent via a sol–gel method. The dependence of the microstructure and electrochemical performance of the synthesizedLiFePO4/Con the pH value of the precursor solution during gel formation and the sintering time was investigated. The obtainedLiFePO4/Cparticles were characterized by X-ray diffraction, field-emission scanning electron microscopy, and element analysis. The results show that the pH value has little effect on the phase purity. At a sintering temperature of 700°C, the discharge capacity ofLiFePO4/Cunder 0.1 C (1 C = 170 mA/g) regime decreased from 152.8 to 62.5 mAh/g with decreasing the sintering time from 12 h to 8 h. Appropriate sintering time can lead to well-crystallizedLiFePO4/C, which improves the electrochemical performance.

Suggested Citation

  • Yan Lin & Hongge Pan & Mingxia Gao & He Miao & Shouquan Li & Yue Wang, 2008. "SYNTHESIS AND CHARACTERIZATION OFLiFePO4/CPREPARED VIA A SOL–GEL METHOD," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 15(01n02), pages 133-138.
    • Handle: RePEc:wsi:srlxxx:v:15:y:2008:i:01n02:n:s0218625x08011111
    DOI: 10.1142/S0218625X08011111
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    Keywords

    LiFePO4/C; sol–gel; pH; sintering time;
    All these keywords.

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