Liebau-Kunzmann, Verena ; Fasel, Claudia ; Kolb, Robert ; Riedel, Ralf (2006)
Lithium containing silazanes as precursors for SiCN:Li ceramics—A potential material for electrochemical applications.
In: Journal of the European Ceramic Society, 26 (16)
doi: 10.1016/j.jeurceramsoc.2005.11.008
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Lithium containing silicon carbonitride ceramics (SiCN:Li) were synthesized via precursor-to-ceramic-transformation of Li-containing (poly)silazanes. The precursors were obtained by lithiation of the model compound 2,4,6-trimethyl-2,4,6-trivinylcyclotrisilazane and of a commercial poly(organosilazane) VL20® with n-butyllithium in different molar ratios. According to Raman spectroscopic measurements, lithiation takes place at the NH groups of the molecular organosilazane structure. If the amount of n-BuLi exceeds the stoichiometric amount of NH groups, addition of n-BuLi at the vinyl groups (attached as substituents at the Si atoms of the silazane) occurs. Thermal analysis coupled with in situ mass spectrometry evidenced the loss of methane and hydrogen as the main gaseous by-products formed during the precursor-to-ceramic-transformation. The ceramization process is completed at 1100 °C in argon and yielded Li-containing silicon carbonitride, SiCN:Li. X-ray powder diffraction revealed that the resulting SiCN:Li ceramics were basically amorphous and contained LiSi2N3 as a crystalline phase with increasing amount of Li. Possible applications of the new SiCN:Li ceramics are seen in the field of Li-ion batteries as alternative anode or solid electrolyte material.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2006 |
| Autor(en): | Liebau-Kunzmann, Verena ; Fasel, Claudia ; Kolb, Robert ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Lithium containing silazanes as precursors for SiCN:Li ceramics—A potential material for electrochemical applications |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2006 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 26 |
| (Heft-)Nummer: | 16 |
| DOI: | 10.1016/j.jeurceramsoc.2005.11.008 |
| Kurzbeschreibung (Abstract): | Lithium containing silicon carbonitride ceramics (SiCN:Li) were synthesized via precursor-to-ceramic-transformation of Li-containing (poly)silazanes. The precursors were obtained by lithiation of the model compound 2,4,6-trimethyl-2,4,6-trivinylcyclotrisilazane and of a commercial poly(organosilazane) VL20® with n-butyllithium in different molar ratios. According to Raman spectroscopic measurements, lithiation takes place at the NH groups of the molecular organosilazane structure. If the amount of n-BuLi exceeds the stoichiometric amount of NH groups, addition of n-BuLi at the vinyl groups (attached as substituents at the Si atoms of the silazane) occurs. Thermal analysis coupled with in situ mass spectrometry evidenced the loss of methane and hydrogen as the main gaseous by-products formed during the precursor-to-ceramic-transformation. The ceramization process is completed at 1100 °C in argon and yielded Li-containing silicon carbonitride, SiCN:Li. X-ray powder diffraction revealed that the resulting SiCN:Li ceramics were basically amorphous and contained LiSi2N3 as a crystalline phase with increasing amount of Li. Possible applications of the new SiCN:Li ceramics are seen in the field of Li-ion batteries as alternative anode or solid electrolyte material. |
| Freie Schlagworte: | Silazanes, Batteries, SiCN/Li |
| Zusätzliche Informationen: | SFB 595 A4 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > A - Synthese DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > A - Synthese > Teilprojekt A4: Neue Funktionskeramiken durch Anionensubstitution in oxidischen Systemen |
| Hinterlegungsdatum: | 04 Aug 2011 12:12 |
| Letzte Änderung: | 18 Dez 2018 12:21 |
| PPN: | |
| Sponsoren: | The authors would like to thank the Deutsche Forschungsgemeinschaft (DFG) for financial support., The present study is part of a DFG-Collaborative Research Center, the SFB 595 “Elektrische Ermüdung in Funktionswerkstoffen”. |
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