Hildebrandt, Sandra ; Eva, Andreas ; Komissinskiy, Philipp ; Fasel, Claudia ; Fritsch, Ingo ; Alff, Lambert (2012)
Sol–gel synthesis of sodium and lithium based materials.
In: Journal of Sol-Gel Science and Technology, 63 (3)
doi: 10.1007/s10971-012-2789-4
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Hildebrandt, Sandra ; Eva, Andreas ; Komissinskiy, Philipp ; Fasel, Claudia ; Fritsch, Ingo ; Alff, Lambert |
| Art des Eintrags: | Bibliographie |
| Titel: | Sol–gel synthesis of sodium and lithium based materials |
| Sprache: | Englisch |
| Publikationsjahr: | 1 September 2012 |
| Verlag: | Springer US |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Sol-Gel Science and Technology |
| Jahrgang/Volume einer Zeitschrift: | 63 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.1007/s10971-012-2789-4 |
| Kurzbeschreibung (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. |
| Freie Schlagworte: | Sol–gel synthesis, Sodium cobaltat, Lithium cobaltates, Low-temperature method |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Dünne Schichten 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 07 Jan 2014 09:53 |
| Letzte Änderung: | 07 Jan 2014 09:53 |
| PPN: | |
| Sponsoren: | This study was supported by the AL560/6-1 project of the Deutsche Forschungsgemeinschaft. |
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