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J. Korean Ceram. Soc. > Volume 42(5); 2005 > Article
Journal of the Korean Ceramic Society 2005;42(5): 352.
doi: https://doi.org/10.4191/kcers.2005.42.5.352
기계적 혼합과 고상법에 의해 합성한 LiNi1-yMyO2(M=Zn2+, Al3+, and Ti4+)의 전기화학적 특성
김훈욱, 윤순도1, 이재천1, 박혜령1, 송명엽
전북대학교 신소재공학부
1전남대학교 응용화학공학부
Electrochemical Properties of LiNi1-yMyO2(M=Zn2+, Al3+, and Ti4+) Synthesized by Milling and Solid-State Reaction Method
Hunuk Kim, SunDo Youn1, Jaecheon Lee1, HyeRyoung Park1, Myoungyoup Song
Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University
1Division of Applied Chemical Engineering, Chonnam National University
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.
Key words: Milling, Solid-state reaction method, Electrochemical properties, R-factor
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