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http://dx.doi.org/10.4191/KCERS.2005.42.5.352

Electrochemical Properties of LiNi1-yMyO2(M=Zn2+, Al3+, and Ti4+) Synthesized by Milling and Solid-State Reaction Method  

Kim, Hunuk (Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University)
Youn, SunDo (Division of Applied Chemical Engineering, Chonnam National University)
Lee, Jaecheon (Division of Applied Chemical Engineering, Chonnam National University)
Park, HyeRyoung (Division of Applied Chemical Engineering, Chonnam National University)
Song, Myoungyoup (Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University)
Publication Information
Journal of the Korean Ceramic Society / v.42, no.5, 2005 , pp. 352-358 More about this Journal
Abstract
By calcining at $750^{\circ}C$ for 30 h in $O_2$ stream after milling, $LiNi_{1-y}M_yO_2(M=Zn^{2+},\;Al^{3+}$, and $Ti^{4+}$, y = 0.005, 0.01, 0.025, 0.05, and 0.1) were synthesized and their electrochemical properties were investigated. All the samples had R3m structure. $LiNi_{1-y}Zn_yO_2$ (y = 0.025, 0.05, and 0.1) contained ZnO anuor $Li_2ZnO_2$ as impurities. Among the samples substituted with the same element, the samples with relatively large value of $I_{003}/I_{104}$ and the smallest R-factor had the largest first discharge capacity and good cycling performance. $LiNi_{0.975}A1_{0.025}O_2$ had the largest first discharge capacity (172.5 mAh/g) and good cycling performance (about $89.4\%$ of the first discharge capacity at the 20th cycle). This sample had the largest value of $I_{003}/I_{104}$ and the smallest R-factor among all the samples. In addition, the particles of this sample were finer and their size was more homogeneous than the other samples. $LiNi_{0.95}A1_{0.05}O_2$ had relatively large first discharge capacity 150.4 mAh/g and good cycling performance.
Keywords
Milling; Solid-state reaction method; Electrochemical properties; R-factor;
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Times Cited By KSCI : 2  (Citation Analysis)
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