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Acta Physico-Chimica Sinica  2011, Vol. 27 Issue (08): 1863-1867    DOI: 10.3866/PKU.WHXB20110807
ELECTROCHEMISTRY AND NEW ENERGY     
Synthesis and Properties of LiFePO4/C Cathode Material with a New Carbon Source
CHU Dao-Bao, LI Yan, SONG Qi, ZHOU Ying
Anhui Key Laboratory of Functional Molecular Solids and Molecular-based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, Anhui Province, P. R. China
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Abstract  

We synthesized LiFePO4/C composite cathode materials by the rheological phase method with vegetable protein soya bean milk as a carbon source while FePO4·4H2O and LiOH·H2O as raw materials. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results showed that the LiFePO4/C composite materials had good crystallinity, ultrafine sphere-like particles of 200 nm in size and in situ carbon. The electrochemical performance of LiFePO4/C by galvanostatic cycling studies showed excellent cycle stability. The LiFePO4/C cathode material gave a high initial discharge capacity of 156 mAh·g-1 at 0.1C and the first columbic efficiency was 98.7%. This capacity was still 149 mAh·g-1 after 40 cycles at 0.1C and its capacity retention was more than 95% while the discharge capacity reached 134.7 mAh·g-1 at 1C indicating high electrochemical capacity and excellent cycling stability.



Key wordsLithium-ion battery      LiFePO4      Cathode material      Vegetable protein      Carbon coating      Bean milk      Rheological phase method     
Received: 08 April 2011      Published: 10 June 2011
MSC2000:  O646  
Fund:  

The project was supported by the National Natural Science Foundation of China (20476001) and Natural Science Foundation of Anhui Province, China (070414160).

Corresponding Authors: CHU Dao-Bao     E-mail: dbchu@sina.com
Cite this article:

CHU Dao-Bao, LI Yan, SONG Qi, ZHOU Ying. Synthesis and Properties of LiFePO4/C Cathode Material with a New Carbon Source. Acta Physico-Chimica Sinica, 2011, 27(08): 1863-1867.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB20110807     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2011/V27/I08/1863

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