A Study On the LiFePO_4/MWCNTs Cathode Materials for Li-ion Batteries

Authors

You-yi PENG, Faculty of Material and Energy,Guangdong University of Technology,Guangzhou 510006,China;
Hai-yan ZHANG, Faculty of Material and Energy,Guangdong University of Technology,Guangzhou 510006,China;
Chun-hua HE, Faculty of Material and Energy,Guangdong University of Technology,Guangzhou 510006,China;
Wei XIE, Faculty of Material and Energy,Guangdong University of Technology,Guangzhou 510006,China;
Zhi-feng ZENG, Faculty of Material and Energy,Guangdong University of Technology,Guangzhou 510006,China;

Abstract

The LiFePO4/MWCNTs composite was synthesized by ball milling,then the composite electrode was assembled into button lithium-ion batteries.The structure and morphology of the samples,the electrochemical performance of the electrodes were investigated by ways of X-ray diffraction,scanning electron microscopy,cyclic voltammetry and charge-discharge capacity tests. The electrochemical performance of the composite electrodes with different MWNTs contents were studied. The results indicated that the composite electrode containing 10% MWCNTs(by mass)exhibited the most excellent electrochemical performance with the initial charge-discharge capacities of 139 mAh·g-1,128.5 mAh·g-1,respectively,and a Kulun efficiency of 92.4% at 0.1C rate under room temperature.Compared to the electrodes with the different MWCNTs contents,it had the longest and steadiest charge-discharge platform,at the same time,it had the lowest polarization,keeping 94.7% of the initial capacity over 40 cycles.

Keywords

ball milling, LiFePO4/MWCNTs, electrochemical performance

DOI Link

https://doi.org/10.61558/2993-074X.2005

Publication Date

2009-08-28

Online Available Date

2009-08-28

Revised Date

2009-08-28

Received Date

2009-08-28

Recommended Citation

You-yi PENG, Hai-yan ZHANG, Chun-hua HE, Wei XIE, Zhi-feng ZENG. A Study On the LiFePO_4/MWCNTs Cathode Materials for Li-ion Batteries[J]. Journal of Electrochemistry, 2009 , 15(3): 331-335.
DOI: 10.61558/2993-074X.2005
Available at: https://jelectrochem.xmu.edu.cn/journal/vol15/iss3/19

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