Low temperature lithium manganese cobalt oxide spinels, Li4-xMn5-2xCo3xO12 (0≤x≤1), for use as cathode materials in rechargeable lithium batteries
2002-08-05
org.kosen.entty.User@1eb324bd
강지훈(kosen1)
첨부파일
이 자료는 보안 문서로 등록이 되어 있습니다. 문서를 열람하시기 원하시는 분은 다음의 사용자 암호를 입력하신 후 사용하시기 바랍니다.
사용자 암호 : www.kosen21.org
Low temperature synthesis of the lithium-rich cubic spinel Li4Mn5O12 with an oxidation state very close to +4 is described. The effect of doping this compound with cobalt according to the solid solution mechanism Li4-xMn5-2xCo3xO12 up to the solid solution limit, LiMnCoO4, has also been explored. The evolution of the structure and electrochemistry with increasing cobalt doping is described. With increasing x there is increasing population of the tetrahedral 8a site by transitino metal ions reaching 25% occupancy by Co at LiMnCoO4 with corresponding displacement of Li to 16d sites. The optimum performance was obtained for the composition Li3.75Mn4.5Co0.75O0.75O12 which yields a capacity of 150mA g-1 at a rate of 25mA g-1 (equivalent to C/6) with no perceptible capacity loss, in sharp contrast to the pure Mn materials.
-
리포트 평점
해당 콘텐츠에 대한 회원님의 소중한 평가를 부탁드립니다. -
0.0 (0개의 평가)