Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Electrochemical Characteristics of Carbon-coated LiFePO4 as a Cathode Material for Lithium Ion Secondary Batteries

  • Shin, Ho-Chul (Battery Research Center, Korea Institute of Science and Technology) ;
  • Lee, Byung-Jo (Battery Research Center, Korea Institute of Science and Technology) ;
  • Cho, Won-Il (Battery Research Center, Korea Institute of Science and Technology) ;
  • Cho, Byung-Won (Battery Research Center, Korea Institute of Science and Technology) ;
  • Jang, Ho (Department of Advanced Materials Engineering, College of Engineering, Korea University)
  • Published : 2005.11.30
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Abstract

The electrochemical properties of $LiFePO_4$ as a cathode for Li-ion batteries were improved by incorporating conductive carbon into the $LiFePO_4$. X-ray diffraction analysis and SEM observations revealed that the carbon-coated $LiFePO_4$ consisted of fine single crystalline particles, which were smaller than the bare $LiFePO_4$. The electrochemical performance of the carbon-coated $LiFePO_4$ was tested under various conditions. The carbon-coated $LiFePO_4$ showed much better performance in terms of the discharge capacity and cycling stability than the bare $LiFePO_4$. The improved electrochemical performances were found to be attributed to the reduced particle size and enhanced electrical conductivity of the $LiFePO_4$ by the carbon.

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References

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