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Performance Study of MXene/Carbon Nanotube Composites for Current Collector‐ and Binder‐Free Mg–S Batteries

Kaland, Henning; Håskjold Fagerli, Frode; Hadler-Jacobsen, Jacob; Zhao-Karger, Zhirong 1; Fichtner, Maximilian 1,2; Wiik, Kjell; Wagner, Nils P.
1 Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


The realization of sustainable and cheap Mg-S batteries depends on significant improvements in cycling stability. Building on the immense research on cathode optimization from Li-S batteries, for the first time a beneficial role of MXenes for Mg-S batteries is reported. Through a facile, low-temperature vacuum-filtration technique, several novel current collector- and binder-free cathode films were developed, with either dipenthamethylene thiuram tetrasulfide (PMTT) or $S_{8}$ nanoparticles as the source of redox-active sulfur. The importance of combining MXene with a high surface area co-host material, such as carbon nanotubes, was demonstrated. A positive effect of MXenes on the average voltage and reduced self-discharge was also discovered. Ascribed to the rich polar surface chemistry of $Ti_{3}C_{2}T_{x}$ MXene, an almost doubling of the discharge capacity (530 vs. 290 mA h $g^{−1}$) was achieved by using MXene as a polysulfide-confining interlayer, obtaining a capacity retention of 83 % after 25 cycles.

Verlagsausgabe §
DOI: 10.5445/IR/1000135106
Veröffentlicht am 07.07.2021
DOI: 10.1002/cssc.202100173
Zitationen: 20
Zitationen: 20
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Post Lithium Storage (POLiS)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 22.04.2021
Sprache Englisch
Identifikator ISSN: 1864-5631, 1864-564X
KITopen-ID: 1000135106
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in ChemSusChem
Verlag Wiley-VCH Verlag
Band 14
Heft 8
Seiten 1864–1873
Vorab online veröffentlicht am 13.02.2021
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