Fluorinated Multi-Walled Carbon Nanotubes Coated Separator Mitigates Polysulfide Shuttle in Lithium-Sulfur Batteries

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dc.citation.articleNumber1804en_US
dc.citation.issueNumber5en_US
dc.citation.journalTitleMaterialsen_US
dc.citation.volumeNumber16en_US
dc.contributor.authorSalpekar, Devashishen_US
dc.contributor.authorDong, Changxinen_US
dc.contributor.authorOliveira, Eliezer F.en_US
dc.contributor.authorKhabashesku, Valery N.en_US
dc.contributor.authorGao, Guanhuien_US
dc.contributor.authorOjha, Veden_US
dc.contributor.authorVajtai, Roberten_US
dc.contributor.authorGalvao, Douglas S.en_US
dc.contributor.authorBabu, Gangulien_US
dc.contributor.authorAjayan, Pulickel M.en_US
dc.date.accessioned2023-03-23T14:10:38Zen_US
dc.date.available2023-03-23T14:10:38Zen_US
dc.date.issued2023en_US
dc.description.abstractLi-S batteries still suffer from two of the major challenges: polysulfide shuttle and low inherent conductivity of sulfur. Here, we report a facile way to develop a bifunctional separator coated with fluorinated multiwalled carbon nanotubes. Mild fluorination does not affect the inherent graphitic structure of carbon nanotubes as shown by transmission electron microscopy. Fluorinated carbon nanotubes show an improved capacity retention by trapping/repelling lithium polysulfides at the cathode, while simultaneously acting as the “second current collector”. Moreover, reduced charge-transfer resistance and enhanced electrochemical performance at the cathode-separator interface result in a high gravimetric capacity of around 670 mAh g−1 at 4C. Unique chemical interactions between fluorine and carbon at the separator and the polysulfides, studied using DFT calculations, establish a new direction of utilizing highly electronegative fluorine moieties and absorption-based porous carbons for mitigation of polysulfide shuttle in Li-S batteries.en_US
dc.identifier.citationSalpekar, Devashish, Dong, Changxin, Oliveira, Eliezer F., et al.. "Fluorinated Multi-Walled Carbon Nanotubes Coated Separator Mitigates Polysulfide Shuttle in Lithium-Sulfur Batteries." <i>Materials,</i> 16, no. 5 (2023) MDPI: https://doi.org/10.3390/ma16051804.en_US
dc.identifier.digitalmaterials-16-01804en_US
dc.identifier.doihttps://doi.org/10.3390/ma16051804en_US
dc.identifier.urihttps://hdl.handle.net/1911/114536en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.rightsThis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) licenseen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleFluorinated Multi-Walled Carbon Nanotubes Coated Separator Mitigates Polysulfide Shuttle in Lithium-Sulfur Batteriesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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