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SYNTHESIS OF HIGHLY CRYSTALLINE OLIVINE-TYPELiFePO4NANOPARTICLES BY SOLUTION-BASED REACTIONS

Author

Listed:
  • DONGHAN KIM

    (Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea)

  • JINSUB LIM

    (Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea)

  • EUNSEOK CHOI

    (Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea)

  • JIHYEON GIM

    (Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea)

  • VINOD MATHEW

    (Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea)

  • YOUNKEE PAIK

    (Daegu Center, Korea Basic Science Institute, Daegu 702-701, Korea)

  • HONGRYUN JUNG

    (School of Applied Chemical Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea)

  • WANJIN LEE

    (School of Applied Chemical Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea)

  • DOCHEON AHN

    (Beamline Research Division, Pohang Accelerator Laboratory, Pohang 790-784, Korea)

  • SEUNGMIN PAEK

    (Beamline Research Division, Pohang Accelerator Laboratory, Pohang 790-784, Korea)

  • JAEKOOK KIM

    (Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea)

Abstract

LiFePO4nanocrystals were synthesized in various polyol media without any further post-heat treatment. TheLiFePO4samples synthesized using three different polyol media namely, diethylene glycol (DEG), triethylene glycol (TEG), and tetraethylene glycol (TTEG), exhibited plate and rod-shaped structures with average sizes of 50–500 nm. The X-ray diffraction (XRD) patterns were indexed on the basis of an olivine structure (space group: Pnma). The samples prepared in DEG, TEG, and TTEG polyol media showed reversible capacities of 123, 155, and 166 mAh/g, respectively, at current density of 0.1 mA/cm2with no capacity fading and exhibited excellent capacity retention up to the 50th cycle. In particular, the samples showed excellent performances at high rates of 30 and 60 C with high capacity retention. It is assumed that the nanometer size materials (~50 nm) possessing a highly crystalline nature may generate improved performance at high rate current densities.

Suggested Citation

  • Donghan Kim & Jinsub Lim & Eunseok Choi & Jihyeon Gim & Vinod Mathew & Younkee Paik & Hongryun Jung & Wanjin Lee & Docheon Ahn & Seungmin Paek & Jaekook Kim, 2010. "SYNTHESIS OF HIGHLY CRYSTALLINE OLIVINE-TYPELiFePO4NANOPARTICLES BY SOLUTION-BASED REACTIONS," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 17(01), pages 111-119.
    • Handle: RePEc:wsi:srlxxx:v:17:y:2010:i:01:n:s0218625x10014053
    DOI: 10.1142/S0218625X10014053
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    Keywords

    Lithium ion battery; LiFePO4; nanocrystal; cathode; polyol;
    All these keywords.

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