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Reactive Interactions between the Ionic Liquid BMP‐TFSI and a Na Surface

Forster-Tonigold, Katrin 1; Buchner, Florian; Groß, Axel 1; Behm, R. Jürgen
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

In order to obtain atomistic insights into the initial stages of the formation of the solid electrolyte interphase (SEI) in Na ion or Na metal batteries, we employ surface chemistry experiments and DFT calculations to study the interactions and reactions between a Na surface and the ionic liquid (IL) 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMP-TFSI), a candidate to be used as electrolyte in batteries. Oxygen-free Na thin films, which were grown on Ru(0001) and characterized by X-ray and ultraviolet photoelectron spectroscopy (XPS, UPS), can be understood as model of a Na-rich electrode. After deposition of submonolayer to multilayer BMP-TFSI films on the Na thin films at room temperature, XPS measurements revealed partial decomposition and the formation of a ‘contact layer’ at the Na surface, consisting of mainly TFSI-based decomposition products.


Verlagsausgabe §
DOI: 10.5445/IR/1000163904
Veröffentlicht am 09.11.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
KIT-Bibliothek (BIB)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2566-6223
KITopen-ID: 1000163904
HGF-Programm 38.02.02 (POF IV, LK 01) Components and Cells
Erschienen in Batteries and Supercaps
Verlag John Wiley and Sons
Band 6
Heft 12
Seiten e202300336
Vorab online veröffentlicht am 23.10.2023
Nachgewiesen in Scopus
Dimensions
Web of Science
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie
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