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http://dx.doi.org/10.4313/JKEM.2006.19.1.064

A Study on Electrochemical Characteristics of LiCoO2/LiNi1/3Mn1/3Co1/3O2 Mixed Cathode for Li Secondary Battery  

Kim Hyun-Soo (한국전기연구원 전지연구그룹)
Kim Sung-Il (한국전기연구원 전지연구그룹)
Eom Seung-Wook (한국전기연구원 전지연구그룹)
Kim Woo-Seong (대정화금(주) 중앙연구소)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.19, no.1, 2006 , pp. 64-70 More about this Journal
Abstract
In this study, the $LiCoO_2/LiNi_{1/3}Mn_{1/3}Co_{1/3}O_2$ mixed cathode electrodes were prepared and their electrochemical performances were measured in a high cut-off voltage. As the content of $LiNi_{1/3}Mn_{1/3}Co_{1/3}O_2$ increased in a mixed cathode, the reversible specific capacity and cycleability of the electrode enhanced, but the rate capability was deteriorated. On the contrary the rate capability of the cathode enhanced, but the reversible specific capacity and cycleability were deteriorated, increasing the content of $LiCoO_2$ in the mixed cathode. The cell of $LiCoO_2/LiNi_{1/3}Mn_{1/3}Co_{1/3}O_2$ ($50:50 wt\%$) mixed cathode delivered a discharge capacity of ca. 168 mAh/g at a 0.2 C rate. The capacity of the cell decreased with the current rate and a useful capacity of ca. 152 mAh/g was obtained at a 2.0 C rate. However, the cell showed very stable cycleability: the discharge capacity of the cell after 20th charge/discharge cycling maintains ca. 163 mAh/g.
Keywords
null; null; Mixed cathode; Li-ion secondary battery; Cycle life; Rate capability;
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Times Cited By KSCI : 1  (Citation Analysis)
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