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Suitability of Carbazolyl Hauser and Turbo‐Hauser Bases as Magnesium‐Based Electrolytes

Schüler, Philipp; Sengupta, Simon; Zaubitzer, Steve; Fiesinger, Florian; Dongmo, Saustin; Görls, Helmar; Wohlfahrt-Mehrens, Margret 1; Borg, Matthias; Gaissmaier, Daniel 1; Krieck, Sven; Marinaro, Mario; Jacob, Timo 1; Westerhausen, Matthias
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)


Lithium-ion batteries pose certain drawbacks and alternatives are highly demanded. Requirements such as low corrosiveness, electrochemical stability and suitable electrolytes can be met by magnesium-ion batteries. Metalation of carbazole with Mg in THF in the presence of ethyl bromide yields the sparingly soluble Hauser base [(thf)$_{3}$Mg(Carb)Br] (1) which shows a Schlenk-type equilibrium with formation of [(thf)$_{3}$Mg(Carb)$_{2}$] and [(thf)4MgBr2]. A THF solution of 1 shows a low over-potential and a good cyclability of electrodeposition/-stripping of Mg on a Cu current collector. An improved performance is achieved with the turbo-Hauser bases [(thf)(Carb)Mg(μ-Br/X)$_{2}$Li(thf)$_{2}$] (X=Br (2) and Cl (3)) which show a significantly higher solubility in ethereal solvents. The THF solvation energies increase from (thf)$_{x}$MgBr$_{2}$ over (thf)$_{x}$Mg(Carb)Br to (thf)$_{x}$Mg(Carb)$_{2}$ for an equal number x of ligated THF molecules.

Verlagsausgabe §
DOI: 10.5445/IR/1000145773
Veröffentlicht am 05.05.2022
DOI: 10.1002/ejic.202200149
Zitationen: 1
Web of Science
Zitationen: 6
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Post Lithium Storage (POLiS)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 17.06.2022
Sprache Englisch
Identifikator ISSN: 1434-1948, 0009-2940, 0365-947X, 0365-9488, 0365-9496, 1099-0682, 1434-2421
KITopen-ID: 1000145773
HGF-Programm 38.02.03 (POF IV, LK 01) Batteries in Application
Erschienen in European Journal of Inorganic Chemistry
Verlag Wiley-VCH Verlag
Band 2022
Heft 17
Seiten Art.-Nr.: e202200149
Vorab online veröffentlicht am 16.03.2022
Nachgewiesen in Dimensions
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