Issue 36, 2022

Few-layered V2C MXene derived 3D V3S4 nanocrystal functionalized carbon flakes boosting polysulfide adsorption and catalytic conversion towards Li–S batteries

Abstract

Li–S batteries (LSBs) with high theoretical energy density, low cost, and environmental friendliness have become a competitive candidate for next-generation energy storage devices. However, the shuttling of soluble lithium polysulfides (LPSs) seriously hampers its practical applications. Herein, an in situ crystal conversion strategy has been adopted to realize the transformation of two-dimensional (2D) V2C MXene into three-dimensional (3D) NiAs-type V3S4 nanocrystal functionalized carbon flakes (V3S4@C). Thanks to the synergetic contributions from the polar V3S4 mediator and conductive carbon framework, the optimized V3S4@C host is endowed with both robust chemical/physical adsorption and high catalytic activity towards polysulfides, effectively alleviating the shuttling effect. As expected, the optimum S/V3S4@C electrode exhibits an exceptional electrochemical performance in terms of both long-duration cycling and high-rate capacities even at high sulfur loading, highlighting the promising prospects of the designed 3D hybrid host for advanced LSBs.

Graphical abstract: Few-layered V2C MXene derived 3D V3S4 nanocrystal functionalized carbon flakes boosting polysulfide adsorption and catalytic conversion towards Li–S batteries

Supplementary files

Article information

Article type
Paper
Submitted
15 Jul 2022
Accepted
06 Aug 2022
First published
08 Aug 2022

J. Mater. Chem. A, 2022,10, 18679-18689

Few-layered V2C MXene derived 3D V3S4 nanocrystal functionalized carbon flakes boosting polysulfide adsorption and catalytic conversion towards Li–S batteries

Z. Tan, S. Liu, X. Zhang, J. Wei, Y. Liu, L. Hou and C. Yuan, J. Mater. Chem. A, 2022, 10, 18679 DOI: 10.1039/D2TA05602J

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