Enhanced structural stability of o-LiMnO2 by sol-gel coating of Al2O3

Authors
Cho, J Kim, YJ Kim, TJ Park, B
Citation
J. Cho et al., Enhanced structural stability of o-LiMnO2 by sol-gel coating of Al2O3, CHEM MATER, 13(1), 2001, pp. 18
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
CHEMISTRY OF MATERIALS
ISSN journal
08974756 → ACNP
Volume
13
Issue
1
Year of publication
2001
Database
ISI
SICI code
0897-4756(200101)13:1<18:ESSOOB>2.0.ZU;2-J
Abstract
Sol-gel coating of Al2O3 and subsequent heat-treatment at 400 degreesC grea tly improved structural instability of orthohombic LiMnO2 during electroche mical cycling at 55 degreesC. The coated electrode showed only 2% capacity loss after 50 cycles, which was superior to that of the bare one (35% loss) in its capacity stability. This was attributed to the formation of a prote ctive coating layer, consisting of LiMn1-xAlxO2, only at the particle surfa ce.