Storch, Mathias ; Vrankovic, Dragoljub ; Graczyk-Zajac, Magdalena ; Riedel, Ralf (2018)
The influence of pyrolysis temperature on the electrochemical behavior of porous carbon-rich SiCN polymer-derived ceramics.
In: Solid State Ionics, 315
doi: 10.1016/j.ssi.2017.11.032
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Within this study we report on the impact of the pyrolysis temperature on the structural and electrochemical properties of porous carbon-rich polymer-derived silicon carbonitride (SiCN) ceramics. Microstructural features of the synthesized materials were characterized in detail and discussed with respect to the lithium storage properties. X-ray diffraction study reveals the amorphous nature of the pyrolysed ceramics up to 1100 °C, while a crystalline SiC-phase is formed at 1400 °C. Micro-Raman spectroscopy shows that pyrolysed samples contain a free disordered carbon phase which tends to order with increasing pyrolysis temperature. Galvanostatic cycling with potential limitation enables to monitor the lithiation and delithiation performance. High irreversible losses are identified during the first cycle lithiation due to formation of SEI. Nevertheless the highest electrode capacities are recorded for the sample pyrolysed at 900 °C reaching a first cycle reversible capacity of 447 mAh·g− 1 and a 100th cycle reversible capacity of 534 mAh·g− 1 at a current of 72 mA·g− 1. Further it is found that the prepared materials offer improved high current lithium storage ability compared to dense SiCN ceramics reported in literature so far.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Storch, Mathias ; Vrankovic, Dragoljub ; Graczyk-Zajac, Magdalena ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | The influence of pyrolysis temperature on the electrochemical behavior of porous carbon-rich SiCN polymer-derived ceramics |
| Sprache: | Englisch |
| Publikationsjahr: | Februar 2018 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Solid State Ionics |
| Jahrgang/Volume einer Zeitschrift: | 315 |
| DOI: | 10.1016/j.ssi.2017.11.032 |
| URL / URN: | https://doi.org/10.1016/j.ssi.2017.11.032 |
| Kurzbeschreibung (Abstract): | Within this study we report on the impact of the pyrolysis temperature on the structural and electrochemical properties of porous carbon-rich polymer-derived silicon carbonitride (SiCN) ceramics. Microstructural features of the synthesized materials were characterized in detail and discussed with respect to the lithium storage properties. X-ray diffraction study reveals the amorphous nature of the pyrolysed ceramics up to 1100 °C, while a crystalline SiC-phase is formed at 1400 °C. Micro-Raman spectroscopy shows that pyrolysed samples contain a free disordered carbon phase which tends to order with increasing pyrolysis temperature. Galvanostatic cycling with potential limitation enables to monitor the lithiation and delithiation performance. High irreversible losses are identified during the first cycle lithiation due to formation of SEI. Nevertheless the highest electrode capacities are recorded for the sample pyrolysed at 900 °C reaching a first cycle reversible capacity of 447 mAh·g− 1 and a 100th cycle reversible capacity of 534 mAh·g− 1 at a current of 72 mA·g− 1. Further it is found that the prepared materials offer improved high current lithium storage ability compared to dense SiCN ceramics reported in literature so far. |
| Freie Schlagworte: | Porous, Silicon carbonitride, Polymer-derived ceramic, Carbon organization, Lithium-ion battery |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 17 Dez 2018 15:47 |
| Letzte Änderung: | 17 Dez 2018 15:47 |
| PPN: | |
| Sponsoren: | We gratefully acknowledge the financial support of the German Research Foundation (DFG) SPP1473/JP8. |
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