Surface modification of cathode materials for lithium ion batteries

We have studied the effect of surface modification with aluminum hydroxide and alumina-boehmite mixtures on the electrochemical performance of an equimolar LiCoO 2 /LiMn 2 O 4 composite cathode material. A process has been developed for the deposition of aluminum hydroxide nanocoatings using ultraso...

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Bibliographic Details
Published in:Inorganic materials 2009-11, Vol.45 (11), p.1299-1303
Main Authors: Makhonina, E. V., Dubasova, V. S., Nikolenko, A. F., Ponomareva, T. A., Kisterev, E. V., Pervov, V. S.
Format: Article
Language:English
Subjects:
Alumina hydrate
Cathodes
Chemistry
Chemistry and Materials Science
Deposition
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Lithium-ion batteries
Materials Science
Nanocomposites
Nanomaterials
Nanostructure
Voltage
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Summary:We have studied the effect of surface modification with aluminum hydroxide and alumina-boehmite mixtures on the electrochemical performance of an equimolar LiCoO 2 /LiMn 2 O 4 composite cathode material. A process has been developed for the deposition of aluminum hydroxide nanocoatings using ultrasonic processing. Al(OH) 3 nanocoatings, as well as alumina-boehmite nanocoatings, considerably improve the cyclability of the composite in an extended voltage range (up to 4.5 V) in comparison with the unmodified material, with an insignificant reduction in specific capacity in the first cycles. Both types of coatings markedly improve the cyclability of the composite at high current rates in comparison with the unmodified composite.
ISSN:0020-1685
1608-3172
DOI:10.1134/S002016850911020X