서지주요정보
Li/$Li_xMn_2O_4$ 셀에서의 충방전에 의한 용량감소와 구조변화에 대한 연구 = A study on the capacity loss and structure change with cycling in Li/$Li_xMn_2O_4$ cell
서명 / 저자 Li/$Li_xMn_2O_4$ 셀에서의 충방전에 의한 용량감소와 구조변화에 대한 연구 = A study on the capacity loss and structure change with cycling in Li/$Li_xMn_2O_4$ cell / 김문규.
저자명 김문규 ; Kim, Moon-Kue
발행사항 [대전 : 한국과학기술원, 1998].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8008706

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 98006

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The capacity loss behaviors of $LiMn_2O_4$ and $LiMn_{1.9}Zn_{0.1}O_4$ prepared by solid state reaction were investigated by cycling experiment with giving various cut-off discharge voltage in 1M $LiClO_4$ propylene carbonate(PC) solution. $LiMn_2O_4$ prepared by emulsion drying method was also investigated by same method. These powder specimens were identified as cubic spinel structure with space group Fd3m by X-ray diffractometry. From the Rietveld refinement result of $LiMn_{1.9}Zn_{0.1}O_4$, it was concluded that the substituted Zn locates in 16d octahedral site of $LiMn_2O_4$ lattice. Composite cathode was charge/discharge cycled in the potential range of cut-off discharge voltage to 4.5V (vs. Li/$Li^+$). Cut-off discharge voltages were 4.0, 3.85 and 3.2V. $LiMn_2O_4$ and $LiMn_{1.9}Zn_{0.1}O_4$ prepared by solid state reaction showed largest capacity loss in low-voltage region of 4V plateau. $LiMn_2O_4$ prepared by emulsion drying method showed largest capacity loss in high-voltage region of 4V plateau. From these results, it could be concluded that the capacity loss behavior of cathode material is related to making process. All XRD pattern of cathode taken after experiment showed no tetragonal spinel phase and it could be concluded that Jahn-Teller distortion doesn't affect the capacity loss in 4V plateau. Small initial capacity of $LiMn_2O_4$ and $LiMn_{1.9}Zn_{0.1}O_4$ prepared by solid state reaction were thought to have relation to severe XRD pattern change.

서지기타정보

서지기타정보
청구기호 {MMS 98006
형태사항 74 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Moon-Kue Kim
지도교수의 한글표기 : 김호기
지도교수의 영문표기 : Ho-Gi Kim
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 72-74
주제 용량감소
$LiMn_2O_4$
리트벨트
고상반응법
에멀젼 드라잉
Capacity loss
$LiMn_2O_4$
Rietveld
Solid state reaction
Emulsion drying
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