Carboxylate-alumoxanes as precursors for alumina coatings to enhance the cyclability of LiCoO2
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Carboxylate-alumoxanes as precursors for alumina coatings
to enhance the cyclability of LiCoO2
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| Creator |
Fey, G.T.
Chen, J.G. Premkumar, T. |
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| Subject |
Lithium batteries
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| Description |
LiCoO2 cathodes coated with Al2O3 derived from carboxylate-alumoxanes have been shown to possess improved cyclability. The
carboxylate-alumoxanes were prepared by reacting pseudo-boehmite with acetic and substituted acetic acids. TEM images of the coated
powders revealed that the alumina formed a compact kernel of thickness averaging about 20 nm. XRD data on the coated materials suggested
the formation of solid solutions of the composition LiAlyCo1−yO2 on the surface, a conclusion attested by ESCA depth profiles. Galvanostatic
cycling studies suggested that a coating formed from (methoxyethoxy)acetate-alumoxane enhanced the cyclability 13-fold. The improved
cyclability is attributed to suppression of the cycle-limiting phase transitions accompanying the charge–discharge processes. The coating
procedure based on carboxylate-alumoxanes is economical and environmentally benign, features attractive for industrial exploitation.
© 2005 Elsevier B.V. All rights reserved.
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| Publisher |
Elsevier
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/123/1/063-2005.pdf
Fey, G.T. and Chen, J.G. and Premkumar, T. (2005) Carboxylate-alumoxanes as precursors for alumina coatings to enhance the cyclability of LiCoO2. Journal of Power Sources, 146. pp. 250-253. |
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| Relation |
http://cecri.csircentral.net/123/
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