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http://dx.doi.org/10.5229/JKES.2014.17.3.149

The Structural Stability and Electrochemical Properties of Fe Doped Li[Ni0.575Co0.1Mn0.325]O2  

Yang, Su-Bin (Department of Nano Polymer Science & Engineering, Korea National University of Transportation)
Yoo, Gi-Won (Department of Nano Polymer Science & Engineering, Korea National University of Transportation)
Jang, Byeong-Chan (Department of Nano Polymer Science & Engineering, Korea National University of Transportation)
Son, Jong-Tae (Department of Nano Polymer Science & Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korean Electrochemical Society / v.17, no.3, 2014 , pp. 149-155 More about this Journal
Abstract
In this study, a positive-electrode material in a lithium secondary battery $Li[Ni_{0.575}Co_{0.1}Mn_{0.325}]O_2$ was synthesized as precursor by co-precipitation. Cathode material was synthesized by adding iron. The synthesized cathode material was analyzed by scanning electron microscope and x-ray diffraction. The analysis of x-ray diffraction showed that the a-axis and c-axis is increased by doping iron. And $I_{(003)}/I_{(104)}$ is increased and $I_{(006)}+I_{(102)}/I_{(101)}$ is decreased. Through this result, it was confirmed that the structural stability is improved. And impedance measurements show that the charge transfer resistance ($R_{ct}$) is lowered by doping iron. Consequently, electrochemical properties are improved by doping iron. In particular, the cycle characteristics are improved at a high temperature condition (328 K). Structural stabilities are contributing to the cycle properties.
Keywords
Lithium ion battery; Cathode material; Fe(Iron) doping; Co-precipitation;
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Times Cited By KSCI : 8  (Citation Analysis)
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