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Novel Phosphonium-Based Ionic Liquid Electrolytes for Battery Applications

Hofmann, Andreas ORCID iD icon 1; Rauber, Daniel; Wang, Tzu-Ming 2; Hempelmann, Rolf; Kay, Christopher W. M.; Hanemann, Thomas 1
1 Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

In this study, we address the fundamental question of the physicochemical and electrochemical
properties of phosphonium-based ionic liquids containing the counter-ions bis(trifluoromethanesul
fonyl)imide ([TFSI]􀀀) and bis(fluorosulfonyl)imide ([FSI]􀀀). To clarify these structure–property as
well as structure–activity relationships, trimethyl-based alkyl- and ether-containing phosphonium
ILs were systematically synthesized, and their properties, namely density, flow characteristics, alkali
metal compatibility, oxidative stability, aluminum corrosivity as well as their use in Li-ion cells
were examined comprehensively. The variable moiety on the phosphonium cation exhibited a chain
length of four and five, respectively. The properties were discussed as a function of the side chain,
counter-ion and salt addition ([Li][TFSI] or [Li][FSI]). High stability coupled with good flow characteristics
were found for the phosphonium IL [P1114][TFSI] and the mixture [P1114][TFSI] + [Li][TFSI],
respectively.


Verlagsausgabe §
DOI: 10.5445/IR/1000148906
Veröffentlicht am 25.07.2022
Originalveröffentlichung
DOI: 10.3390/molecules27154729
Scopus
Zitationen: 8
Web of Science
Zitationen: 5
Dimensions
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Post Lithium Storage (POLiS)
Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1420-3049
KITopen-ID: 1000148906
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Molecules
Verlag MDPI
Band 27
Heft 15
Seiten Art.Nr.: 4729
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 24.07.2022
Schlagwörter ionic liquid; phosphonium; electrochemistry; batteries
Nachgewiesen in Web of Science
Dimensions
Scopus
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