Please use this identifier to cite or link to this item: doi:10.22028/D291-28919
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Title: Nitrogen-containing novolac-derived carbon beads as electrode material for supercapacitors
Author(s): Krüner, Benjamin
Schreiber, Anna
Tolosa, Aura
Quade, Antje
Badaczewski, Felix
Pfaff, Torben
Smarsly, Bernd M.
Presser, Volker
Language: English
Title: Carbon
Volume: 132
Startpage: 220
Endpage: 231
Publisher/Platform: Elsevier
Year of Publication: 2018
Publikation type: Journal Article
Abstract: We pyrolyzed and activated novolac beads in one single step with ammonia at different temperatures (750–950 °C), which leads to a highly porous carbon with nitrogen-doping. The chemical and physical properties were characterized and correlated with the electrochemical performance as supercapacitor electrodes. The average pore size varied at 0.6–1.4 nm dependent on the synthesis temperatures. Three different electrolytes (aqueous, organic, and an ionic liquid) were tested. The specific capacitance in a symmetrical supercapacitor reached up to 173 F g−1 and was strongly dependent on the porosity of the electrode material and the kind of electrolyte. We found that the presence of nitrogen enhanced the electrochemical performance stability and led to a high specific energy of 50 Wh·kg−1 using an ionic liquid as electrolyte.
DOI of the first publication: 10.1016/j.carbon.2018.02.029
Link to this record: hdl:20.500.11880/27822
ISSN: 1873-3891
Date of registration: 17-Sep-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Volker Presser
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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