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  • 03월 07일 12시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Lit[LiyCoxMn1-x-y]O2 Nanoparticles for Lithium Battery Cathode Material Made by Cationic Exchange from K-Birnessite

등록일
2007년 2월 13일 11시 41분 44초
접수번호
0998
발표코드
31P264포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅲ>
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
엄준호, 조재필
금오공과대학교 응용화학과,
Li0.93[Li0.21Co0.27Mn0.51]O2 nanoparticles with an R-3m space group is hydrothermally prepared from Co0.35Mn0.65O2 obtained from an ion-exchange reaction with K-birnessite K0.32MnO2 at 200oC. Even at a hydrothermal reaction temperature of 150oC, the spinel (Fd3m) phase is dominant, and a layered phase became dominant by combining an increase in the temperature to 200oC with an increase in lithium concentration. The as-prepared cathode particle has plate-like hexagonal morphology with a size of 100 nm and the thickness of 20 nm. The first discharge capacity of the cathode is 258 mAh/g with an irreversible capacity ratio of 22%, and the capacity retention after 30 cycles is 95% without developing a plateau at ~3 V. Capacity retention of the cathode discharge is 84% at 4C rate (= 1000 mA/g) and shows full capacity recovery when decreasing the C rate to 0.1 C.

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