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J. Korean Ceram. Soc. > Volume 42(9); 2005 > Article
Journal of the Korean Ceramic Society 2005;42(9): 631.
doi: https://doi.org/10.4191/kcers.2005.42.9.631
기계적 혼합과 고상법에 의해 합성한 LiNi1-yGayO2의 전기화학적 특성
김훈욱, 윤순도1, 이재천1, 박혜령1, 박찬기, 송명엽
전북대학교 신소재공학부 공학연구원신소재개발연구센터
1전남대학교 응용화학부
Electrochemical Properties of LiNi1-yGayO2 Synthesized by Milling and Solid-State Reaction Method
HunUk Kim, SunDo Youn1, JaeCheon Lee1, HyeRyoung Park1, Chan-Gi Park, MyoungYoup Song
Division of Advanced Materials Engineering, Research Center of Advanced Materials Development, Engineering Research Institute, Chonbuk National University
1Division of Applied Chemical Engineering, Chonnam National University
ABSTRACT
$LiNi_{1-y}Ga_yO_2$ (y = 0.005, 0.010, 0.025, 0.050, and 0.100) were synthesized by the solid-state reaction method after mechanical mixing, and their_electrochemical properties were investigated. All the $LiNi_{1-y}Ga_yO_2$ (y=0.005, 0.010, 0.025, 0.050, and 0.100) samples had the R3m structure. The sample with y = 0.025 showed the largest first discharge capacity (131.4 mAh/g) and good cycling performance [discharge capacity 117.5 mAh/g ($89.4{%}$ of the first discharge capacity) at the 20th cycle]. The first discharge capacity decreased as the value of y increased. The samples with y = 0.010 and y = 0.005 had small R-factor but their cycling performance was worse than that of the sample with y = 0.025. All the $LiNi_{1-y}Ga_yO_2$ samples had smaller discharge capacities than $LiNiO_2$, but their cycling performances were better than that of $LiNiO_2$.
Key words: Milling, Soid-state reaction method, Electrochemical properties, R-factor
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