Enhanced cyclability of LiCoO2 cathodes coated with alumina derived from carboxylate–alumoxanes
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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Title |
Enhanced cyclability of LiCoO2 cathodes coated with alumina derived from carboxylate–alumoxanes
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Creator |
Fey, G.T.
Chen, J.G. Premkumar, T. |
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Subject |
Lead acid batteries
Lithium batteries Electrochemical Power Sources |
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Description |
LiCoO2 cathodes coated with Al2O3 generated from carboxylate–alumoxanes have demonstrated sustainable
extended cyclability. The carboxylate–alumoxanes were prepared by reacting boehmite with acetic and substituted
acetic acids. TEM images of the coated powders revealed that the coatings were compact and had an average
thickness of about 20 nm. XRD data on the coated materials indicated minor changes in the values of the lattice
parameters, suggesting the formation of solid solutions of the composition LiAlyCo1–yO2 on the surface during
calcination. ESCA depth profiles of the constituent elements in the coated particles support this theory. R-factor
values from XRD analysis and galvanostatic cycling studies suggest that a 1.0 wt. % coating formed from a
(methoxyethoxy)acetate-alumoxane enhanced the cyclability by a factor of 12. The improved performance is
attributed to suppression of the cycle-limiting phase transitions accompanying the charge–discharge processes.
Being without environmentally hazardous organic chemicals and by-products, the coating procedure based on
carboxylate–alumoxanes is a clean and benign process for industrial exploitation.
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Publisher |
Springer
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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/77/1/038-2005.pdf
Fey, G.T. and Chen, J.G. and Premkumar, T. (2005) Enhanced cyclability of LiCoO2 cathodes coated with alumina derived from carboxylate–alumoxanes. Journal of Applied Electrochemistry, 35 (2). pp. 177-184. |
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Relation |
http://cecri.csircentral.net/77/
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