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Impacts of Graphite Negative Materials Morphology on the Performance of LiFePO4 Power Battery

  • CHEN Peng ,
  • QIAN Long ,
  • DENG Chang-yuan ,
  • WANG Hai-tao ,
  • JIAO Qi-fang ,
  • LIU Jia-jie ,
  • RAO Mu-min
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  • 1. Shenzhen OptimumNano Battery Co., Ltd, Shenzhen 518118, Guangdong, China;
    2. School of Chemical & material, Zhuhai Campus of Beijing Institute of Technology, Zhuhai 519088, Guangdong, China

Received date: 2016-02-29

  Revised date: 2016-04-05

  Online published: 2016-06-27

Abstract

Three different cylindrical lithium iron phosphate (LiFePO4) power batteries were fabricated by using resin-coated natural graphite (RCNG), artificial graphite (AG) and mesophase carbon microbeads (MCMB) as negative material, respectively. Crystalline structure and morphology of the materials were characterized by X-ray diffraction analyzer (XRD) and scanning electron microscopy (SEM). Electrochemical performance of each power battery was tested by various charge/discharge means. The results showed that the lithium iron phosphate/mesophase carbon microbeads (LFP/MCMB) battery exhibited better electrochemical performance in low temperature, rate and cycle performance. It remained 61.04% of 1 C capacity retention at −20°C, capacity retention and temperature elevation at 6 C high-rate were respectively 87.52% and 24.8°C, and capacity retention at 3 C rate was 93.81% after 1 000 cycles.

Cite this article

CHEN Peng , QIAN Long , DENG Chang-yuan , WANG Hai-tao , JIAO Qi-fang , LIU Jia-jie , RAO Mu-min . Impacts of Graphite Negative Materials Morphology on the Performance of LiFePO4 Power Battery[J]. Advances in New and Renewable Energy, 2016 , 4(3) : 195 -200 . DOI: 10.3969/j.issn.2095-560X.2016.03.005

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