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Received October 30, 2007
Accepted November 26, 2007
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Mechanochemical Process로 제조된 LiCoO2의 전기화학적 특성
Electrochemical Properties of LiCoO2 Prepared by Mechanochemical Process
KIST 이차전지연구센터, 136-791 서울시 성북구 하월곡동 39-1 1고려대학교 화공생명공학과, 136-701 서울시 성북구 안암동 5-1 2충북대학교 화학공학부, 361-763 충북 청주시 흥덕구 성봉로 410
Battery Research Center, KIST, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Korea 1Department of Chemical and Biological Engineering, Korea University, 5-1 Anam-dong, Seongbuk-gu, Seoul 136-701, Korea 2School of Chemical Engineering, Chungbuk National University, 410 Sungbong-ro, Heungduk-gu, Chungbuk 361-763, Korea
nabk@chungbuk.ac.kr
Korean Chemical Engineering Research, February 2008, 46(1), 69-75(7), NONE Epub 28 February 2008
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Abstract
Mechanochemical process로 제조된 LiCoO2 전극의 경우에 4.3 V 이상의 전위영역에서 용량감소현상이 두드러지게 나타난 반면에, Zr을 피복한 LiCoO2의 경우에는 4.5 V의 전위에서도 안정성을 유지하였다. 본 연구에서 제작한 Zr이 피복된 LiCoO2 전극은 3.0~4.5 V 구간에서 197 mAh/g의 용량을 나타내었으며, 50 사이클 후에 96%의 방전용량을 유지하므로 전지의 안정성을 확보하였다.
Discharge capacity of LiCoO2 in preparation by mechanochemical process decreased_x000D_
remarkably over 4.3V. However, Zr coating of LiCoO2 showed very stable electrochemical properties up to 4.5V. Zr coating of LiCoO2 in this experiment showed the discharge capacity of 197 mAh/g at 3.0-4.5V, and it maintained 96% of the initial discharge capacity after 50 cycle of charge/discharge.
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