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

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...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2022-09, Vol.10 (36), p.18679-18689
Main Authors: Tan, Zhaolin, Liu, Sen, Zhang, Xu, Wei, Jingxuan, Liu, Yang, Hou, Linrui, Yuan, Changzhou
Format: Article
Language:English
Subjects:
Adsorption
Batteries
Carbon
Catalytic activity
Catalytic converters
Conversion
Electrochemical analysis
Electrochemistry
Energy storage
Flakes
Lithium
Lithium sulfur batteries
MXenes
Nanocrystals
Polysulfides
Sulfur
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Summary: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.
ISSN:2050-7488
2050-7496
DOI:10.1039/d2ta05602j