Silicon oxycarbide-derived carbons from a polyphenylsilsequioxane precursor for supercapacitor applications

Meier A, Weinberger M, Pinkert K, Oschatz M, Paasch S, Giebeler L, Althues H, Brunner E, Eckert J, Kaskel S (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Microporous and Mesoporous Materials Elsevier

Book Volume: 188

Pages Range: 140-148

DOI: 10.1016/j.micromeso.2013.12.022

Abstract

In this study, we report on the preparation of new silicon oxycarbide-derived carbons (SiOCDC) obtained by pyrolysis and chlorination of a polyphenylsilsesquioxane pre-ceramic precursor. Wet-chemical conversion of phenyltrimethoxysilane (PhTMS) to the organosilica material was conducted using a two-step acid/base sol-gel process in aqueous medium. The resulting material was subsequently pyrolysed at 700, 1000 and 1300 C to obtain a non-porous silicon oxycarbide ceramic. Chlorination at 700 and 1000 C led to carbons having large surface areas exceeding 2000 m2 g-1 as well as large micro-/mesopore volumes up to 1.4 cm3 g-1. The temperature of the thermal treatment significantly influences the carbon and final pore structure. Pyrolysis at 700 C and subsequent chlorination at 700 C led to a mainly microporous material, whereas pyrolysis at 1300 C and subsequent chlorination at 1000 C generated a hierarchically porous SiOCDC with micro- and mesopores, respectively. All SiOCDC materials were prepared as supercapacitor electrodes using an aqueous slurry containing polytetrafluoroethylene (PTFE) and sodium carboxymethyl cellulose (CMC) as binder. With an organic electrolyte (1 M TEABF4 in acetonitrile) capacitances of up to 110 F g-1 and good long term stabilities could be observed. © 2014 Elsevier B.V. All rights reserved.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Zentrum für Sonnenenergie- und Wasserstoff-Forschung (ZSW) DE Germany (DE) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology DE Germany (DE)

How to cite

APA:

Meier, A., Weinberger, M., Pinkert, K., Oschatz, M., Paasch, S., Giebeler, L.,... Kaskel, S. (2014). Silicon oxycarbide-derived carbons from a polyphenylsilsequioxane precursor for supercapacitor applications. Microporous and Mesoporous Materials, 188, 140-148. https://doi.org/10.1016/j.micromeso.2013.12.022

MLA:

Meier, Andreas, et al. "Silicon oxycarbide-derived carbons from a polyphenylsilsequioxane precursor for supercapacitor applications." Microporous and Mesoporous Materials 188 (2014): 140-148.

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