THE STRUCTURE OF A 3 V LIXMNO CATHODE AND ITS CHANGE UPON ELECTROCHEMICAL LITHIATION

Citation
E. Levi et al., THE STRUCTURE OF A 3 V LIXMNO CATHODE AND ITS CHANGE UPON ELECTROCHEMICAL LITHIATION, Journal of the Electrochemical Society, 145(10), 1998, pp. 3440-3443
Citations number
12
Categorie Soggetti
Electrochemistry,"Materials Science, Coatings & Films
ISSN journal
00134651
Volume
145
Issue
10
Year of publication
1998
Pages
3440 - 3443
Database
ISI
SICI code
0013-4651(1998)145:10<3440:TSOA3V>2.0.ZU;2-8
Abstract
The crystal structure of Li0.33MnO2 obtained by heat-treatment of a ga mma-MnO2 and LiNO3 mixture (Li/Mn ratio 1:3, 370 degrees C, 20 h), whi ch is used as a 3 V cathode in rechargeable lithium batteries, is prop osed as an ordered alternation of [1 x 2] and [1 x 1] channels. The si mulation of this structure by the Rietveld method is in good agreement with the powder X-ray diffraction pattern of this material. It has be en shown that the major difference between the structures of gamma-MnO 2 and the thermal lithiated product is the ordering in the MnO6-octahe dra arrangement. This leads to the high reversibility and cyclability of this cathode material in rechargeable Li batteries.