Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 20    No. 5    May 2010

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Electrochemical performances of LiFePO4/C composites prepared by
molten salt method
CHEN Zhao-yong(陈召勇), ZHU Wei(朱 伟), ZHU Hua-li(朱华丽),
ZHANG Jian-li(张建利), LI Qi-feng(李奇峰)

College of Physics and Electronic Science, Changsha University of Science and Technology,
Changsha 410114, China

Abstract:LiFePO4/C composites were synthesized by a molten salt (MS) method using the mixture of LiCl, LiOH and NaCl. The prepared LiFePO4/C composites are characterized by X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM) and charge−discharge test. XRD patterns indicate that LiFePO4 prepared in the temperature range of 550−700 ℃ crystallizes well in an olivine-type structure. Through FESEM images, the sphere-like and homogeneous particles of 0.2 μm can be observed. The charge−discharge test shows that the materials prepared at 600 ℃ for 12 h have good electrochemical performance. At the rates of 0.2C (34 mA/g) and 0.5C, the discharge capacities are 144.6 and 122.3 mA∙h/g, respectively, together with good cycle performances.

 

Key words: lithium iron phosphate; molten salt method; cathode material; Li-ion batteries

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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