Abstract
A process has been developed for surface modification of an equimolar LiCoO2-LiMn2O4 composite with a mixture of alumina (Al2O3) and boehmite (AlO(OH)). The alumina: boehmite ratio and pH value have been optimized in order to achieve adequate surface adhesion between the coating and powder and good homogeneity of the nanocoatings. The effects of ultrasonic processing, coating conditions, and thermal annealing have been examined. The results demonstrate that the nanocoatings considerably improve the cyclability of the composite in an extended voltage range (up to 4.5 V) in comparison with the unmodified material and slightly increase its average discharge voltage.
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Original Russian Text © E.V. Makhonina, Ya.V. Shatilo, V.S. Dubasova, A.F. Nikolenko, T.A. Ponomareva, E.V. Kisterev, V.S. Pervov, 2009, published in Neorganicheskie Materialy, 2009, Vol. 45, No. 8, pp. 1006–1012.
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Makhonina, E.V., Shatilo, Y.V., Dubasova, V.S. et al. Surface-modified cathode materials based on an LiCoO2-LiMn2O4 composite. Inorg Mater 45, 935–941 (2009). https://doi.org/10.1134/S0020168509080214
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DOI: https://doi.org/10.1134/S0020168509080214