Journal of Central South University

, Volume 22, Issue 12, pp 4507–4514 | Cite as

Effect of different carbon precursors on properties of LiFePO4/C

  • Zheng-wei Xiao (肖政伟)
  • Ying-jie Zhang (张英杰)
  • Guo-rong Hu (胡国荣)
Article
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Abstract

The anoxic decomposition and influence of carbon precursors on the properties of LiFePO4/C prepared by using Fe2O3 were investigated. X-ray powder diffractometry, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and carbon content and charge–discharge tests were applied to the characterization of the as-synthesized cathodes. Partial carbon is lost in the anaerobic decomposition of organic precursors and a high hydrogen content leads to a high residual carbon rate. Pyromellitic anhydride and citric acid participate in reactions before and in ball-milling. All the chosen carbon precursors are capable of producing LiFePO4 with high degree of crystallinity and purity. The carbon derived from α-D-glucose, pyromellitic anhydride, soluble starch, citric acid and polyacrylamide has a loose and porous texture in LiFePO4/C which forms conduction on and between LiFePO4 particles. LiFePO4/C prepared by using α-D-glucose, pyromellitic anhydride, citric acid and sucrose exhibits appreciable electrochemical performance. Graphite alone is able to enhance the electrochemical performance of LiFePO4 to a limited extent but incapable of preparing practical cathode.

Key words

LiFePO4 lithium ion cell carbon precursor decomposition charge–discharge test graphite 
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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Zheng-wei Xiao (肖政伟)
    • 1
  • Ying-jie Zhang (张英杰)
    • 1
  • Guo-rong Hu (胡国荣)
    • 2
  1. 1.Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunmingChina
  2. 2.School of Metallurgy and EnvironmentCentral South UniversityChangshaChina

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