| 기계적 혼합과 고상법에 의한 LiNiO2의 합성과 전기화학적 특성 |
| 김훈욱, 윤순도1, 이재천1, 박혜령1, 송명엽 |
전북대학교 신소재공학부
1전남대학교 응용화학공학부 |
| Study on the Synthesis by Milling and Solid-State Reaction Method and Electrochemical Properties of LiNiO2 |
| Hunuk Kim, SunDo Youn1, Jaecheon Lee1, HyeRyoung Park1, Myoungyaup 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 |
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| ABSTRACT |
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[ $LiNiO_2$ ] 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. |
| Key words:
Milling, Solid-state reaction method, Electrochemical properties, R-factor |
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