Bitte benutzen Sie diese Referenz, um auf diese Ressource zu verweisen: doi:10.22028/D291-27553
Titel: Polymer-derived carbides and carbons with and without nitrogen-doping for electrochemical energy applications
Verfasser: Krüner, Benjamin
Sprache: Englisch
Erscheinungsjahr: 2018
SWD-Schlagwörter: carbon
energy storage
supercapacitor
DDC-Sachgruppe: 540 Chemie
Dokumentart : Dissertation
Kurzfassung: Porous carbon materials are widely used in electrochemical applications for intermediate energy storage or water desalination. This work aimed to synthesize nanoporous carbons with well-controlled properties (e.g., specific surface area, average pore size, chemical composition) to correlate them to the performance in electrochemical applications (e.g., supercapacitors, LiS batteries). Especially the surface chemistry of highly porous carbons with different oxygen and nitrogen groups influences the electrochemical behavior. The carbon materials were obtained from polymeric precursors, including phenolic resins and polysilsesquioxanes. A physical activation with CO 2 or NH 3 that additionally introduced nitrogen groups was applied to adjust the porosity of the phenolic resin-derived carbons. Thereby, it was possible to obtain materials with different properties from the same precursor. The polysilsesquioxanes were first pyrolyzed and then thermally treated with chlorine gas to produce carbide-derived carbons. The porosity was tuned by the composition of the precursor and the synthesis temperature. The intermediate product (silicon oxycarbide) is also an attractive electrode material for Li-ion batteries. It was shown that optimization of the carbon content resulted in extended cycling stability.
Link zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-ds-275535
hdl:20.500.11880/27257
http://dx.doi.org/10.22028/D291-27553
Erstgutachter: Presser, Volker
Tag der mündlichen Prüfung: 28-Nov-2018
SciDok-Publikation: 13-Dez-2018
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Materialwissenschaft und Werkstofftechnik
Fakultät / Institution:SciDok - Elektronische Dokumente der UdS

Dateien zu dieser Ressource:
Datei Beschreibung GrößeFormat 
Dissertation_Benjamin Krüner_2018.pdfDissertation_B-Krüner56,85 MBAdobe PDFÖffnen/Anzeigen


Alle Ressourcen in diesem Repository sind urheberrechtlich geschützt.