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An MXene-based aerogel with cobalt nanoparticles as an efficient sulfur host for room-temperature Na–S batteries

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Abstract

High energy density room temperature sodium–sulfur (RT Na–S) batteries are receiving increasing attention as promising energy storage systems. However, the volume expansion of sulfur and the shuttle effect of polysulfides are the biggest obstacles to their development. In this study, a 3D porous aerogel (hybridized by Ti3C2Tx MXene and rGO) adhered with cobalt nanoparticles (MG-Co) is applied to RT Na–S batteries. The integration of highly conductive MXene and rGO into a crosslinked aerogel structure can alleviate the volume expansion of sulfur during (dis)charge. Moreover, the polar surface of Ti3C2Tx and the catalysis of cobalt particles can boost the strong chemical adsorption and conversion of soluble polysulfides. As a result, RT Na–S batteries assembled with MG-Co@S electrodes deliver a high specific capacity of 705 mA h g−1 at 0.1 C and retain 428 mA h g−1 at 5 C.

Graphical abstract: An MXene-based aerogel with cobalt nanoparticles as an efficient sulfur host for room-temperature Na–S batteries

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Article information


Submitted
04 Aug 2020
Accepted
23 Sep 2020
First published
07 Oct 2020

Inorg. Chem. Front., 2020, Advance Article
Article type
Research Article

An MXene-based aerogel with cobalt nanoparticles as an efficient sulfur host for room-temperature Na–S batteries

Q. Yang, T. Yang, W. Gao, Y. Qi, B. Guo, W. Zhong, J. Jiang and M. Xu, Inorg. Chem. Front., 2020, Advance Article , DOI: 10.1039/D0QI00939C

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