期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 20, 期 5, 页码 809-813出版社
ELSEVIER
DOI: 10.1016/S1003-6326(09)60218-1
关键词
lithium iron phosphate; molten salt method; cathode material; Li-ion batteries
资金
- Scientific Research Fund of Hunan Provincial Education Department of China [06B002]
- Natural Science Foundation of Hunan Province, China [09JJ3092]
- Planned Science and Technology Project of Hunan Province, China [2008FJ3008]
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 degrees C crystallizes well in an olivine-type structure. Through FESEM images, the sphere-like and homogeneous particles of 0.2 mu m can be observed. The charge discharge test shows that the materials prepared at 600 degrees C 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.
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