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Titel: Asymmetric tin–vanadium redox electrolyte for hybrid energy storage with nanoporous carbon electrodes
VerfasserIn: Lee, Juhan
Tolosa, Aura
Krüner, Benjamin
Jäckel, Nicolas
Fleischmann, Simon
Zeiger, Marco
Kim, Daekyu
Presser, Volker
Sprache: Englisch
Titel: Sustainable energy & fuels : interdisciplinary research for the development of sustainable energy technologies
Bandnummer: 1
Heft: 2
Startseite: 299
Endseite: 307
Verlag/Plattform: RSC
Erscheinungsjahr: 2017
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: In recent decades, redox-active electrolytes have been applied in stationary energy storage systems, benefitting from Faradaic reactions of the electrolyte instead of the electrode material. One of the challenging tasks is to balance the redox activities between the negative and positive electrode. As a possible solution, a mixed electrolyte with vanadyl and tin sulfate was previously suggested; however, a low power performance is a great challenge to be overcome. Here, we found that the origin of the poor power performance in the mixture electrolyte system (vanadium complex and tin solution) is the reduction of the pore volume at the positive electrode via irreversible tin dioxide formation. To prevent the latter, we introduce a hybrid energy storage system exhibiting both battery-like and supercapacitor-like features via asymmetric redox electrolytes at the microporous activated carbon electrodes; SnF2 solution as anolyte and VOSO4 as catholyte. By employing an anion exchange membrane, the irreversible SnO2 formation at the positive electrode is effectively suppressed; thus, an asymmetric 1 M SnF2|3 M VOSO4 system provides a high maximum specific power (3.8 kW kg−1 or 1.5 kW L−1), while still exhibiting a high maximum specific energy up to 58.4 W h kg−1 (23.4 W h L−1) and a high cycling stability over 6500 cycles.
DOI der Erstveröffentlichung: 10.1039/C6SE00062B
URL der Erstveröffentlichung: https://pubs.rsc.org/en/content/articlelanding/2017/se/c6se00062b#!divAbstract
Link zu diesem Datensatz: hdl:20.500.11880/28048
http://dx.doi.org/10.22028/D291-29119
ISSN: 2398-4902
Datum des Eintrags: 10-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

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