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The Character of Dislocations in LiCoO2

Gabrisch, H. and Yazami, R. and Fultz, B. (2002) The Character of Dislocations in LiCoO2. Electrochemical and Solid-State Letters, 5 (6). A111-A114. ISSN 1099-0062.

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Dislocations in LiCoO2 were observed by transmission electron microscopy, and their Burgers vectors were determined by analysis of diffraction contrast in tilting experiments. The configuration of all dislocations indicates that they are glissile, and dislocation configurations were found that are indicative of active slip planes. Perfect dislocations of a/3<112-bar 0> type Burgers vectors were observed on {0001} habit planes. These perfect dislocations sometimes dissociate into Shockley partial dislocations with a/3<101-bar 0> type Burgers vectors. Glide of these partial dislocations can account for the sequence of crystal structures O3, H1-3, O1 that occur with the delithiation of LiCoO2. The presence of glissile dislocations also suggests possible damage mechanisms during cycling.

Item Type:Article
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Fultz, B.0000-0002-6364-8782
Additional Information:© 2002 The Electrochemical Society Manuscript submitted November 9, 2001; revised manuscript received December 20, 2001. Available electronically April 2, 2002. The authors gratefully thank ENAX Inc. of Japan for the disposal of the sample material. This work has been supported by the U.S. Department of Energy through Basic Energy Sciences grant DE-FG03-00ER15035. California Institute of Technology assisted in meeting the publication costs of this article.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-00ER15035
Subject Keywords:lithium compounds; electrochemical electrodes; dislocation structure; slip; transmission electron microscopy; electron diffraction; crystal structure
Issue or Number:6
Record Number:CaltechAUTHORS:GABessl02
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2997
Deposited By: Archive Administrator
Deposited On:10 May 2006
Last Modified:02 Oct 2019 22:58

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