Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (03): 609-614.doi: 10.3866/PKU.WHXB20110241

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Synthesis and Properties of Spindle-Shaped LiFePO4 for the Cathode Material of Lithium Ion Battery

SU Chang, LU Guo-Qiang, XU Li-Huan, ZHANG Cheng, MA Chun-An   

  1. State Key Laboratory Breeding Base for Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
  • Received:2010-10-18 Revised:2010-11-24 Published:2011-03-03
  • Contact: ZHANG Cheng
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51003095) and Research on Public Welfare Technology Application Projects of Zhejiang Province, China (2010C31121).


We synthesized LiFePO4 directly by a solvothermal method at low temperature and then a heat treatment was carried out to give a LiFePO4/C composite for using as a cathode in lithium ion battery. The crystal structure and the charge-discharge performance of the prepared samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and galvanostatic charge-discharge testing. The results indicated that the LiFePO4 synthesized at low-temperature (120 °C) with glycerol as a solvent had a single olivine-type crystal structure and a spindle-shaped morphology with a very narrow size distribution. After heat treatment, a LiFePO4/C composite with excellent charge-discharge performance was obtained and the spindle morphology of the sample was intact. Galvanostatic charge-discharge tests showed that the prepared LiFePO4/C cathode had an initial discharge specific capacity of 147.2 mAh·g-1 at 0.1C at room temperature and it was 136.3 mAh·g-1 after 50 cycles. The average discharge specific capacities of LiFePO4/C at 0.2C, 0.5C, and 1C were about 130, 120, and 108 mAh·g-1, respectively.

Key words: Lithium ion battery, LiFePO4, Spindle-shaped, Solvothermal method, Charge-discharge performance


  • O646