Journal
NANOPHOTONICS
Volume 9, Issue 7, Pages 2025-2032Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2019-0568
Keywords
cathode; electrochemical performance; Li-S battery; Mxene; sulfur
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Funding
- Key R&D Projects of Jiangxi Province [20192BBEL50013]
- National Nature Science Foundation of China [51702157]
- China Postdoctoral Science Foundation [2017M611795]
- Natural Science Foundation of colleges and universities of Jiangsu Province in China [17KJB150022]
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The design of sulfur hosts with polar, sulfurphilic, and conductive network is critical to lithium-sulfur (Li-S) batteries whose potential applications are greatly limited by the lithium polysulfide shuttle effect. Mxenes, possessing layered-stacked structures and high electrical conductivities, have a great potential in sulfur hosts. Herein, sulfur nanoparticles uniformly decorated on titanium carbide Mxene (S@Ti3C2Tx Mxene) are synthesized via a hydrothermal method and then utilized as a cathode for lithium-sulfur batteries. This unique architecture could accommodate sulfur nanoparticles expansion during cycling, suppress the shuttling of lithium polysulfide, and enhance electronical conductivity. Consequently, the S@Mxene with a high areal sulfur loading (similar to 4.0 mg cm(-2)) exhibits a high capacity (1477.2 mAh g(-1)) and a low capacity loss per cycle of 0.18% after 100 cycles at 0.2 C. This work may shed lights on the development of high performance sulfur-based cathode materials for Li-S batteries.
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