Abstract
Crystalline LiNi1/3Co1/3Mn1/3O2 powders have been synthesized by two different procedures, using carbonate coprecipitation from sulfate and nitrate solutions, followed by two-step heat treatment of a mixture of the resultant Ni1/3Co1/3Mn1/3CO3 precursor and Li2CO3 at 500 and 900°C. The powders have been characterized by X-ray diffraction, scanning electron microscopy, and dynamic light scattering. The results demonstrate that the synthesized compounds have a hexagonally ordered, layered structure of the α-NaFeO2 type. The primary-particle (crystallite) size in the powders is 50 nm and the aggregate size is 150–250 nm. The average size of larger structures (agglomerates) is 11 and 18 μm in the powders prepared via the sulfate and nitrate routes, respectively. The chemical stability of the synthesized powders is shown to depend on the ambient medium. Prolonged storage in air leads to the formation of new, lithium-deficient phases, especially in the case of the powders prepared from nitrate solutions.
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Original Russian Text © A.A. Titov, Z.V. Eremenko, E.G. Goryacheva, N.P. Sokolova, N.L. Opolchenova, N.N. Stepareva, G.P. Korobko, 2013, published in Neorganicheskie Materialy, 2013, Vol. 49, No. 2, pp. 198–205.
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Titov, A.A., Eremenko, Z.V., Goryacheva, E.G. et al. Synthesis, structure, and some properties of LiNi1/3Co1/3Mn1/3O2 . Inorg Mater 49, 202–208 (2013). https://doi.org/10.1134/S0020168513020222
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DOI: https://doi.org/10.1134/S0020168513020222