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Preparation and Performance of LiFePO4/C Using Fe2O3 as Starting Material

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Abstract:

To improve the electrochemical performance of LiFePO4, LiFePO4/C composite materials were prepared by solid-state synthesis method with Fe2O3 as one of the starting materials. The phase composition, microstructure and morphology of samples were determined by X-ray diffraction (XRD) and scanning electron microscope (SEM). The electrochemical performance of samples were characterized by constant current charge-discharge method. The results show that the prepared samples have the single phase, and the carbon coating lead to no change of the crystal structure of LiFePO4. The sample with carbon content of 10wt% shows the best electrochemical properties. Its initial discharge capacity is 144.6 mA·h /g at 0.2C rate. After 30 cycles the capacity remains 131.4 mA·h /g, and the capacity retention rate is 91%.

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Eco-Materials Processing and Design XIII View Preview

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Periodical:

Materials Science Forum (Volume 724)

Pages:

295-298

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.724.295

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Online since:

June 2012

Authors:

Qiang Ren, Yang Yang, Xiu Lan Wu

Keywords:

Carbon Coating, Cathod Material, Electrochemistry Property, LiFePO4/C

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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