Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Study on the Synthesis by Milling and Solid-State Reaction Method and Electrochemical Properties of LiNiO2

기계적 혼합과 고상법에 의한 LiNiO2의 합성과 전기화학적 특성

  • 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, Myoungyaup (Division of Advanced Materials Engineering, Research Center of Industrial Technology, Engineering Research Institute, Chonbuk National University)
  • 김훈욱 (전북대학교 신소재공학부) ;
  • 윤순도 (전남대학교 응용화학공학부) ;
  • 이재천 (전남대학교 응용화학공학부) ;
  • 박혜령 (전남대학교 응용화학공학부) ;
  • 송명엽 (전북대학교 신소재공학부)
  • Published : 2005.05.01
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Abstract

[ $LiNiO_2$ ] was synthesized by the solid-state method after mixing $LiOH{\cdot}H_2O$ and $Ni(OH)_2$ with SPEX mill. The optimum condition for the synthesis of $LiNiO_2$ was the calcination at $750^{\circ}C$ for 30h in $O_2$ stream after milling for 1 h. The $LiNiO_2$ synthesized under this condition showed relatively large value of $I_{003}/I_{104}$ and relatively small value of R-factor. When $LiNiO_2$ was cycled in 2.7$\~$4.15 V at 0.1C-rate, the first discharge capacity was not very large (145.8 mAh/g) but it showed good cycling performance. When $LiNiO_2$ was cycled in 2.7$\~$4.2 V at 0.1C-rate, the first discharge capacity was large but ,it showed poor cycling performance probably because of the transition of H2 hexagonal structure to H3 hexagonal structure. In addition, when $LiNiO_2$ was cycled in 1.0$\~$4.8 V at 1/24C- rate, the first discharge capacity was very large (257.7 mAh/g) and the discharge capacity increased with the number of cycles.

Keywords

References

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