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Published in: Journal of Sol-Gel Science and Technology 3/2012

01-09-2012 | Original Paper

Sol–gel synthesis of sodium and lithium based materials

Authors: Sandra Hildebrandt, Andreas Eva, Philipp Komissinskiy, Claudia Fasel, Ingo Fritsch, Lambert Alff

Published in: Journal of Sol-Gel Science and Technology | Issue 3/2012

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Abstract

Sodium and lithium cobaltates are important materials for thermoelectric and battery applications due to their large thermoelectric power and ability to (de-) intercalate the alkali metal. For these applications, phase pure materials with controlled microstructure are required. We report on the sol–gel synthesis of sodium- and lithium-based materials by using acetate precursors. The produced Na2/3CoO2, Li(Ni1/3Mn1/3Co1/3)O2, and Li(Ni1/2Co1/2)O2 powders are phase pure with grain sizes below 1 μm. X-ray diffraction and energy-dispersive spectral analyses show that the cation stoichiometry is preserved in the lithium-based compounds. Despite the low temperatures, the sodium content is reduced by 1/3 as compared to the initial value. Chemical phases of the investigated powders are formed in the sol–gel route at temperatures typically 100–200 K lower than those used in the conventional solid-state synthesis of these materials. The suggested sol–gel synthesis is a low temperature process suited for production of phase pure and homogeneous materials with volatile cations.

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Metadata
Title
Sol–gel synthesis of sodium and lithium based materials
Authors
Sandra Hildebrandt
Andreas Eva
Philipp Komissinskiy
Claudia Fasel
Ingo Fritsch
Lambert Alff
Publication date
01-09-2012
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 3/2012
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-012-2789-4

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