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Polyoxometalate Modified Separator for Performance Enhancement of Magnesium–Sulfur Batteries

Ji, Yuanchun 1; Liu-Théato, Xinyang 2; Xiu, Yanlei 1; Indris, Sylvio ORCID iD icon 2; Njel, Christian 2,3; Maibach, Julia 2; Ehrenberg, Helmut 2; Fichtner, Maximilian 1; Zhao-Karger, Zhirong 1
1 Karlsruher Institut für Technologie (KIT)
2 Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS), Karlsruher Institut für Technologie (KIT)
3 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)


The magnesium–sulfur (Mg‐S) battery has attracted considerable attention as a candidate of post‐lithium battery systems owing to its high volumetric energy density, safety, and cost effectiveness. However, the known shuttle effect of the soluble polysulfides during charge and discharge leads to a rapid capacity fade and hinders the realization of sulfur‐based battery technology. Along with the approaches for cathode design and electrolyte formulation, functionalization of separators can be employed to suppress the polysulfide shuttle. In this study, a glass fiber separator coated with decavanadate‐based polyoxometalate (POM) clusters/carbon composite is fabricated by electrospinning technique and its impacts on battery performance and suppression of polysulfide shuttling are investigated. Mg–S batteries with such coated separators and non‐corrosive Mg[B(hfip)4]2 electrolyte show significantly enhanced reversible capacity and cycling stability. Functional modification of separator provides a promising approach for improving metal–sulfur batteries.

Verlagsausgabe §
DOI: 10.5445/IR/1000131409
Veröffentlicht am 16.04.2021
DOI: 10.1002/adfm.202100868
Zitationen: 27
Web of Science
Zitationen: 26
Zitationen: 32
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Post Lithium Storage (POLiS)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 23.06.2021
Sprache Englisch
Identifikator ISSN: 1616-301X, 1057-9257, 1099-0712, 1616-3028
KITopen-ID: 1000131409
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Advanced Functional Materials
Verlag Wiley-VCH Verlag
Band 31
Heft 26
Seiten Art.-Nr.: 2100868
Vorab online veröffentlicht am 29.03.2021
Schlagwörter functional separator, magnesium–sulfur batteries, polysulfide shuttle
Nachgewiesen in Scopus
Web of Science
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