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Modeling of adsorption processes at nanostructured cathodes in lithium-sulfur batteries

Lück, Jessica und Latz, Arnulf (2016) Modeling of adsorption processes at nanostructured cathodes in lithium-sulfur batteries. Bunsentagung 2016, 2016-05-05 - 2016-05-07, Rostock, Deutschland.

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Kurzfassung

Due to its high theoretical energy density lithium-sulfur batteries are one of the most promising candidates for future energy storage. This position is further based on low costs, an intrinsic overload protection, non-toxicity and the natural abundance of its compounds [1]. Nevertheless even after 5 decades of research lithium-sulfur cells are still far away from a commercialization. All occurring challenges in the operation of lithium-sulfur batteries are associated with intermediate species, which are produced when lithium reacts with sulfur [2]. These lithium polysufides differ in their chain length and their solubility. Soluble polysulfides generate a redox shuttle between cathode and anode, while insoluble polysulfides precipitate on the anode. This leads to a reduction of active sulfur and to a corrosion and polarization of the anode. One strategy to overcome this is a structuring of the cathode to retain soluble lithium polysulfides [3]. We present a thermodynamically consistent continuum model for nanostructured sulfur carbon composite cathodes. All polysulfides are assumed to be contained in carbon particles. Particular emphasis is put to the adsorption of Li ions on the carbon surface and covers the influence of the electrochemical double-layer. The surface effects are modeled from electrostatic considerations only, without assuming structural properties of the double-layer. Therefore, the model allows us insight into the chemical and physical processes at the electrode-electrolyte interface as well as their influence on the operation of a Li-S battery. [1] L.F. Nazar et al., J. Mater. Chem., 20, 9821-9826, (2010). [2] S.S. Zhang, J. Power Sources 231, 153-162, (2013). [3] G. Zheng, Nano Lett. 11, 4462-4467, (2011).

elib-URL des Eintrags:https://elib.dlr.de/108999/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Modeling of adsorption processes at nanostructured cathodes in lithium-sulfur batteries
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Lück, JessicaJessica.Lueck (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Latz, Arnulfarnulf.latz (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Mai 2016
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Double-Layer Lithium-Sulfur
Veranstaltungstitel:Bunsentagung 2016
Veranstaltungsort:Rostock, Deutschland
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:5 Mai 2016
Veranstaltungsende:7 Mai 2016
Veranstalter :Deutsche Bunsen-Gesellschaft für physikalische Chemie
HGF - Forschungsbereich:Energie
HGF - Programm:Speicher und vernetzte Infrastrukturen
HGF - Programmthema:Elektrochemische Energiespeicher
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E EV - Energieverfahrenstechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Prozesse (Batterien) (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Computergestützte Elektrochemie
Hinterlegt von: Lück, Jessica
Hinterlegt am:06 Dez 2016 11:22
Letzte Änderung:24 Apr 2024 20:14

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