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Impact of blending with polystyrene on the microstructural and electrochemical properties of SiOC ceramic
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.
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Authors (2)
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Magdalena Graczyk-Zajac
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- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1111/ijac.14186
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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International Journal of Applied Ceramic Technology
no. 20,
pages 51 - 58,
ISSN: 1546-542X - Language:
- English
- Publication year:
- 2023
- Bibliographic description:
- Wilamowska-Zawłocka M., Graczyk-Zajac M.: Impact of blending with polystyrene on the microstructural and electrochemical properties of SiOC ceramic// International Journal of Applied Ceramic Technology -Vol. 20,iss. 1 (2023), s.51-58
- DOI:
- Digital Object Identifier (open in new tab) 10.1111/ijac.14186
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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