Wilamowska‐Zawlocka, Monika ; Graczyk-Zajac, Magdalena (2023)
Impact of blending with polystyrene on the microstructural and electrochemical properties of SiOC ceramic.
In: International Journal of Applied Ceramic Technology, 20 (1)
doi: 10.1111/ijac.14186
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
In this work, we present the electrochemical behavior and microstructural analysis of silicon oxycarbide (SiOC) ceramics influenced by an addition of polystyrene (PS). Polymer-derived ceramics were obtained by pyrolysis (1000 degrees C, Ar atmosphere) of different polysiloxanes prepared by sol-gel synthesis. This method is very effective to obtain desired composition of final ceramic. Two alkoxysilanes phenylthriethoxysilane and diphenyldimethoxysilane were used as precursors. Before pyrolysis polysiloxanes were mixed with PS using toluene as a solvent. Blending with PS affects the microstructure and free carbon content in the final ceramic material. Free carbon phase has been confirmed to be a major lithium storage host. Nevertheless, we demonstrate here that capacity does not increase linearly with increasing carbon content. We show that the amount of SiO4 units in the SiOC microstructure increases the initial capacity but decreases the cycling stability and rate capability of the material. Furthermore, the microstructure of the free carbon influences the electrochemical performance of the ceramic: More ordered graphitic clusters favor better rate capability performance.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Wilamowska‐Zawlocka, Monika ; Graczyk-Zajac, Magdalena |
| Art des Eintrags: | Bibliographie |
| Titel: | Impact of blending with polystyrene on the microstructural and electrochemical properties of SiOC ceramic |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Applied Ceramic Technology |
| Jahrgang/Volume einer Zeitschrift: | 20 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1111/ijac.14186 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | In this work, we present the electrochemical behavior and microstructural analysis of silicon oxycarbide (SiOC) ceramics influenced by an addition of polystyrene (PS). Polymer-derived ceramics were obtained by pyrolysis (1000 degrees C, Ar atmosphere) of different polysiloxanes prepared by sol-gel synthesis. This method is very effective to obtain desired composition of final ceramic. Two alkoxysilanes phenylthriethoxysilane and diphenyldimethoxysilane were used as precursors. Before pyrolysis polysiloxanes were mixed with PS using toluene as a solvent. Blending with PS affects the microstructure and free carbon content in the final ceramic material. Free carbon phase has been confirmed to be a major lithium storage host. Nevertheless, we demonstrate here that capacity does not increase linearly with increasing carbon content. We show that the amount of SiO4 units in the SiOC microstructure increases the initial capacity but decreases the cycling stability and rate capability of the material. Furthermore, the microstructure of the free carbon influences the electrochemical performance of the ceramic: More ordered graphitic clusters favor better rate capability performance. |
| Freie Schlagworte: | carbon organization, lithium-ion battery, polymer-derived ceramic, silicon oxycarbide, pitch-polysilane blends, lithium-ion batteries, anode materials, rechargeable lithium, composite anodes, storage, insertion, mechanism, capacity, performance |
| Zusätzliche Informationen: | First published online: 28 August 2022 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| TU-Projekte: | DFG|GR4440/4-1|Jenseits der Li-Ione |
| Hinterlegungsdatum: | 12 Dez 2022 07:11 |
| Letzte Änderung: | 27 Nov 2023 07:06 |
| PPN: | 502503416 |
| Zugehörige Links: | |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Impact of blending with polystyrene on the microstructural and electrochemical properties of SiOC ceramic. (deposited 24 Nov 2023 13:56)
- Impact of blending with polystyrene on the microstructural and electrochemical properties of SiOC ceramic. (deposited 12 Dez 2022 07:11) [Gegenwärtig angezeigt]
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