Bitte benutzen Sie diese Referenz, um auf diese Ressource zu verweisen: doi:10.22028/D291-29114
Volltext verfügbar? / Dokumentlieferung
Titel: Carbide-derived carbon beads with tunable nanopores from continuously produced polysilsesquioxanes for supercapacitor electrodes
VerfasserIn: Krüner, Benjamin
Odenwald, Christina
Tolosa, Aura
Schreiber, Anna
Aslan, Mesut
Kickelbick, Guido
Presser, Volker
Sprache: Englisch
Titel: Sustainable energy & fuels : interdisciplinary research for the development of sustainable energy technologies
Bandnummer: 1
Heft: 7
Startseite: 1588
Endseite: 1600
Verlag/Plattform: RSC
Erscheinungsjahr: 2017
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: The MicroJet reactor technique is an excellent continuous method to produce spherical and homogeneous organically modified silica (ORMOSIL) particles in a large scale (10–15 g min−1). We applied this method to manufacture polyorganosilsesquioxanes with different ratios of phenyl and vinyl functional groups, which were later pyrolyzed to obtain silicon oxycarbides. Such polymer-derived ceramic (PDC) materials are highly suited as precursor for carbide-derived carbon (CDC) synthesis. Chlorine etching of PDC at high temperatures removed silicon and oxygen, yielding the formation of nanoporous carbon. Pure poly(phenyl-silsesquioxane) spheres lost their shape during the thermal process by undergoing further condensation reactions. Yet, the spherical shape was conserved during thermal processing after adding vinyl functionalities. The ratio of vinyl and phenyl functionalities controlled the pore structure and the total CDC yield, enabling an increase from 2 mass% to 22 mass%. The total pore volume varied between 1.3-2.1 cm3 g−1 and the specific surface area between 2014–2114 m2 g−1. The high surface area and large pore volume makes these materials attractive for high power supercapacitor electrodes. The specific capacitance of the best sample at low rates in 1 M tetraethylammonium tetrafluoroborate in acetonitrile was 116 F g−1 (at 5 mA g−1) and still 80 F g−1 at very high rates (at 100 A g−1).
DOI der Erstveröffentlichung: 10.1039/C7SE00265C
URL der Erstveröffentlichung: https://pubs.rsc.org/en/content/articlehtml/2017/se/c7se00265c
Link zu diesem Datensatz: hdl:20.500.11880/28022
http://dx.doi.org/10.22028/D291-29114
ISSN: 2398-4902
Datum des Eintrags: 8-Okt-2019
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
NT - Materialwissenschaft und Werkstofftechnik
Professur: NT - Prof. Dr. Guido Kickelbick
NT - Prof. Dr. Volker Presser
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

Dateien zu diesem Datensatz:
Es gibt keine Dateien zu dieser Ressource.


Alle Ressourcen in diesem Repository sind urheberrechtlich geschützt.