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http://dx.doi.org/10.5229/JKES.2005.8.4.168

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)
Publication Information
Journal of the Korean Electrochemical Society / v.8, no.4, 2005 , pp. 168-171 More about this Journal
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.
Keywords
Lithium iron phosphate; Carbon coating; Lithium ion batteries; Mechanochemical activation; X-ray diffraction;
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