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Journal of Inorganic Materials

Journal of Inorganic Materials >

2007 , Vol. 22 >Issue 6: 1032 - 1036

DOI: https://doi.org/10.3724/SP.J.1077.2007.01032

Research Paper

Synthesis and Performance of LiFePO4/C Prepared with Nonaqueous Sol-Gel Method

  • FAN Jun-Liang ,
  • PAN Hong-Ge ,
  • GAO Ming-Xia ,
  • LIN Yan ,
  • LIU Ji-Qiang
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  • Department of Material Science and Engineering, Zhejiang University, Hangzhou 310027, China

Received date: 2006-11-26

  Revised date: 2007-01-09

  Online published: 2007-11-20

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Abstract

LiFePO4/C was synthesized by a sol-gel method using glycol as solvent. X-ray diffraction and scanning electron microscope were used for the phase identification and the structural observation of the synthesized LiFePO4 products. The electrochemical properties including the cycle stability, the discharge capacity under different discharge rates of LiFePO4 synthesized at 600--750℃ were investigated by means of electrochemical impedance spectroscope and other methods. The results show that the crystallization and electrochemical performance of LiFePO4/C are affected remarkably by the sintering temperature. LiFePO4/C sintered at 700℃ is well crystallized and has an even distribution of gain with size of around 150nm, exhibiting excellent electrochemical properties. Its discharge capacity reaches 150mAh/g at 0.5C and the discharge capacity still reaches 141mAh/g at 1C. The discharge capacity of the LiFePO4/C is almost reserved after 200 cycles.

Key words： LiFePO4; in situ decomposition; cycle stability; sintering temperature; discharge capacity

Cite this article

FAN Jun-Liang , PAN Hong-Ge , GAO Ming-Xia , LIN Yan , LIU Ji-Qiang . Synthesis and Performance of LiFePO4/C Prepared with Nonaqueous Sol-Gel Method[J]. Journal of Inorganic Materials, 2007 , 22(6) : 1032 -1036 . DOI: 10.3724/SP.J.1077.2007.01032

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