Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Electrochemical Properties of LiNi1-yGayO2 Synthesized by Milling and Solid-State Reaction Method

기계적 혼합과 고상법에 의해 합성한 LiNi1-yGayO2의 전기화학적 특성

  • Kim, HunUk (Division of Advanced Materials Engineering, Research Center of Advanced Materials Development, 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) ;
  • Park, Chan-Gi (Division of Advanced Materials Engineering, Research Center of Advanced Materials Development, Engineering Research Institute, Chonbuk National University) ;
  • Song, MyoungYoup (Division of Advanced Materials Engineering, Research Center of Advanced Materials Development, Engineering Research Institute, Chonbuk National University)
  • 김훈욱 (전북대학교 신소재공학부 공학연구원신소재개발연구센터) ;
  • 윤순도 (전남대학교 응용화학부) ;
  • 이재천 (전남대학교 응용화학부) ;
  • 박혜령 (전남대학교 응용화학부) ;
  • 박찬기 (전북대학교 신소재공학부 공학연구원신소재개발연구센터) ;
  • 송명엽 (전북대학교 신소재공학부 공학연구원신소재개발연구센터)
  • Published : 2005.09.01
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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 $LiNiO_2$.

Keywords

References

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