Pradeep, V. S. ; Graczyk-Zajac, Magdalena ; Wilamowska, Monika ; Riedel, Ralf ; Sorarù, Gian D. (2014)
Influence of pyrolysis atmosphere on the lithium storage properties of carbon-rich polymer derived SiOC ceramic anodes.
In: Solid State Ionics, 262
doi: 10.1016/j.ssi.2013.08.043
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Polymer derived carbon-rich SiOC ceramics are prepared from polysiloxane precursors through a pyrolysis process at 1000 °C using pure argon and argon/hydrogen mixture as pyrolysis atmosphere. The precursor is synthesized from a linear (Si–H)-containing polysiloxane cross-linked with divinylbenzene using hydrosilylation reaction in the presence of a platinum catalyst. Pyrolysis in Ar/H2 mixtures, compared to the treatment under pure Ar, results into a decrease of the concentration of C dangling bonds as revealed by electron spin resonance (ESR) measurements. The amount of free carbon phase is 10 wt.% lower in the sample pyrolysed in a Ar/H2 mixture, while the ratio of hydrogen to free carbon remains constant for both, in Ar and in Ar/H2 pyrolysed samples. The sample prepared under Ar/H2 mixture shows an excellent cycling stability with an increase in the specific capacity of about 150 mAhg− 1 compared to its analogues pyrolysed in pure argon atmosphere.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Pradeep, V. S. ; Graczyk-Zajac, Magdalena ; Wilamowska, Monika ; Riedel, Ralf ; Sorarù, Gian D. |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of pyrolysis atmosphere on the lithium storage properties of carbon-rich polymer derived SiOC ceramic anodes |
| Sprache: | Englisch |
| Publikationsjahr: | 1 September 2014 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Solid State Ionics |
| Jahrgang/Volume einer Zeitschrift: | 262 |
| DOI: | 10.1016/j.ssi.2013.08.043 |
| Kurzbeschreibung (Abstract): | Polymer derived carbon-rich SiOC ceramics are prepared from polysiloxane precursors through a pyrolysis process at 1000 °C using pure argon and argon/hydrogen mixture as pyrolysis atmosphere. The precursor is synthesized from a linear (Si–H)-containing polysiloxane cross-linked with divinylbenzene using hydrosilylation reaction in the presence of a platinum catalyst. Pyrolysis in Ar/H2 mixtures, compared to the treatment under pure Ar, results into a decrease of the concentration of C dangling bonds as revealed by electron spin resonance (ESR) measurements. The amount of free carbon phase is 10 wt.% lower in the sample pyrolysed in a Ar/H2 mixture, while the ratio of hydrogen to free carbon remains constant for both, in Ar and in Ar/H2 pyrolysed samples. The sample prepared under Ar/H2 mixture shows an excellent cycling stability with an increase in the specific capacity of about 150 mAhg− 1 compared to its analogues pyrolysed in pure argon atmosphere. |
| Freie Schlagworte: | Li-ion batteries; Anodes; Polymer derived ceramics; SiOC |
| Zusätzliche Informationen: | SFB 595 A4 Solid State Ionics 19 Proceedings of the 19th International Conference on Solid State Ionics |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 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 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 01 Jul 2014 08:45 |
| Letzte Änderung: | 07 Jul 2014 12:17 |
| PPN: | |
| Sponsoren: | Financial support from the German Science Foundation within SFB 595/A4 program is acknowledged. , The authors thank Jan Kaspar for the elemental analysis measurements and Dr. Emanuela Callone for the ESR measurements., G.D. Soraru and V.S. Pradeep acknowledge the financial support from the EU through the MC INT FUNEA, CT-264873. |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum