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Acta Physico-Chimica Sinica  2009, Vol. 25 Issue (05): 1004-1008    DOI: 10.3866/PKU.WHXB20090418
Article     
Preparation of Li2FeSiO4 Cathode Material for Lithium-Ion Batteries by Microwave Synthesis
HU Guo-Rong, CAO Yan-Bing, PENG Zhong-Dong, DU Ke, JIANG Qing-Lai
School of Metallurgical Science and Engineering, Central South University, Changsha 410083, P. R. China
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Abstract  

We report a novel synthetic route for the preparation of the Li2FeSiO4 cathode material by microwave processing. The Li2FeSiO4 material was synthesized using mechanical ball-milling and subsequent microwave processing. The prepared samples were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical methods. Properties of the prepared materials and electrochemical characteristics of the samples were investigated and compared to samples prepared by the conventional solid-state reaction. The obtained results indicated that highly pure Li2FeSiO4 material with uniform and fine particle size was quickly and successfully synthesized by microwave (MW) heating at 650 ℃ for 12 min. This compound showed high specific capacity and good cycle ability. The initial discharge capacity of the sample obtained by MW heating delivered 119.5 mAh·g-1 at 60 ℃ at a current density of C/20 rate (1C=160 mA·g-1). After 10 cycles the discharge capacity maintained 116.2 mAh·g-1. The Li2FeSiO4 material displayed higher phase purity, better microstructure, and better electrochemical properties than the sample prepared by the conventional solid-state method.



Key wordsLi-ion battery      Cathode material      Li2FeSiO4      Microwave synthesis     
Received: 01 December 2008      Published: 23 February 2009
MSC2000:  O646  
Corresponding Authors: HU Guo-Rong   
Cite this article:

HU Guo-Rong, CAO Yan-Bing, PENG Zhong-Dong, DU Ke, JIANG Qing-Lai. Preparation of Li2FeSiO4 Cathode Material for Lithium-Ion Batteries by Microwave Synthesis. Acta Physico-Chimica Sinica, 2009, 25(05): 1004-1008.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20090418     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2009/V25/I05/1004

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