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Performance Study of MXene/Carbon Nanotube Composites for Current Collector‐ and Binder‐Free Mg–S Batteries
Author(s) -
Kaland Henning,
Håskjold Fagerli Frode,
HadlerJacobsen Jacob,
ZhaoKarger Zhirong,
Fichtner Maximilian,
Wiik Kjell,
Wagner Nils P.
Publication year - 2021
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202100173
Subject(s) - carbon nanotube , composite material , materials science , current collector , current (fluid) , carbon fibers , nanotechnology , composite number , chemistry , electrode , engineering , electrolyte , electrical engineering
Abstract 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.