Bitte benutzen Sie diese Referenz, um auf diese Ressource zu verweisen:
Volltext verfügbar? / Dokumentlieferung
doi:10.22028/D291-29115
Titel: | Hydrogen-treated, sub-micrometer carbon beads for fast capacitive deionization with high performance stability |
VerfasserIn: | Krüner, Benjamin Srimuk, Pattarachai Fleischmann, Simon Zeiger, Marco Schreiber, Anna Aslan, Mesut Quade, Antje Presser, Volker |
Sprache: | Englisch |
Titel: | Carbon : an international journal sponsored by the American Carbon Society |
Bandnummer: | 117 |
Startseite: | 46 |
Endseite: | 54 |
Verlag/Plattform: | Elsevier |
Erscheinungsjahr: | 2017 |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | Novolac is a low-cost carbon precursor which can be used to derive nanoporous carbon beads in sub-micrometer size. In this study, we introduce this material as a novel electrode material for capacitive deionization (CDI) with high performance stability and superior desalination rate. The polymer beads were synthesized employing a self-emulsifying system in an autoclave, pyrolyzed under argon, and activated with CO2, yielding a specific surface area of 1905 m2 g−1 with a high total pore volume of 1.26 cm3 g−1. After CO2 activation, the material shows a salt sorption capacity of ∼8 mg g−1, but the performance is highly influenced by functional groups, causing an inversion peak and fast performance decay. However, de-functionalization via hydrogen treatment is outlined as an effective strategy to improve the CDI performance. After hydrogen treatment of novolac-derived carbon beads, we obtained a salt sorption capacity of 11.5 mg g−1 with a charge efficiency of more than 80% and a performance stability of around 90% over more than 100 cycles. Particularly attractive for practical application is the very high average salt adsorption rate of 0.104 mg g−1 s−1, outperforming commercial activated carbons, which are commonly used for CDI, by at least a factor of two. |
DOI der Erstveröffentlichung: | 10.1016/j.carbon.2017.02.054 |
URL der Erstveröffentlichung: | https://www.sciencedirect.com/science/article/abs/pii/S0008622317301835 |
Link zu diesem Datensatz: | hdl:20.500.11880/27999 http://dx.doi.org/10.22028/D291-29115 |
ISSN: | 0008-6223 |
Datum des Eintrags: | 2-Okt-2019 |
Fakultät: | NT - Naturwissenschaftlich- Technische Fakultät |
Fachrichtung: | NT - Materialwissenschaft und Werkstofftechnik |
Professur: | 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.