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, 2023, 20 (1)
doi: 10.26083/tuprints-00023739
Artikel, Zweitveröffentlichung, Verlagsversion
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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°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: | Zweitveröffentlichung |
| Titel: | Impact of blending with polystyrene on the microstructural and electrochemical properties of SiOC ceramic |
| Sprache: | Englisch |
| Publikationsjahr: | 24 November 2023 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2023 |
| Ort der Erstveröffentlichung: | Oxford |
| Verlag: | Wiley-Blackwell |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Applied Ceramic Technology |
| Jahrgang/Volume einer Zeitschrift: | 20 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.26083/tuprints-00023739 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/23739 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| 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°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 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-237396 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| 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: | 24 Nov 2023 13:56 |
| Letzte Änderung: | 27 Nov 2023 07:05 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Impact of blending with polystyrene on the microstructural and electrochemical properties of SiOC ceramic. (deposited 24 Nov 2023 13:56) [Gegenwärtig angezeigt]
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