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http://hdl.handle.net/1942/37352| Title: | Impact of Different Conductive Polymers on the Performance of the Sulfur Positive Electrode in Li–S Batteries | Authors: | SHAFIQUE, Ahmed Vanhulsel, Annick Rangasamy, Vijay Shankar SAFARI, Momo Bragaggia, Giulia Gross, Silvia ADRIAENSENS, Peter VAN BAEL, Marlies HARDY, An Sallard, Sebastien |
Advisors: | hardy, an | Issue Date: | 2022 | Publisher: | Source: | ACS Applied Energy Materials, | Abstract: | Sulfurparticleswerecoatedwithconductivepolymerlayers bydielectricbarrierdischarge(DBD)plasmatechnologyunderatmospheric conditions(ambientpressureandlowtemperature).TheDBDplasma processisadryandsustainable(solvent-free,limitedenergyconsumption) techniquecompatiblewithupscaling.Differentconductivecoatedsulfur materialswereproducedandlabeledas“PEDOT-S”[poly(3,4-ethylene dioxythiophene-sulfur)],“PANI-S”(polyaniline-sulfur),“PTs-S”(polythiophene-sulfur),and“PPy-S”(polypyrrole-sulfur).Thecorresponding electricalconductivitiesweremeasuredat10−5,10−6,10−7,and10−8S/ cm,respectively.Theroleoftheconductivecoatingistoenhancethe electrochemicalperformanceofLi−Scellsbyimprovingtheelectronic conductivityofthesulfurparticlesandpreventingthewell-known polysulfideshuttlephenomenon.Avastrangeofcharacterizationmethods includingconductivityanalysis,X-raydiffraction,scanningelectron microscopy,X-rayphotoelectronspectroscopy,andcarbon-13NMR(nuclearmagneticresonancespectroscopy)wereusedto assessthechemicalcharacteristicsusingthedifferentconductivepolymer-coatedsulfurmaterials.Inthecoatedsulfursamples, fragmentationofaromaticringswasobserved,88%forthePTs-Sand42%forthePEDOT-S,whileitisverylimitedforthePANI-S. Suchaphenomenonhasneverbeenreportedintheliterature.Theuncoatedandcoatedsulfurpowderswereused(asactive material)inpositiveelectrodesofLi−Scellswitharelativelyhighsulfurloadingof∼4.5mg/cm2usingLiPAA(lithiumpolyacrylate) asan(aqueous)binder.Long-termgalvanostaticcyclingatC/10andmulti-C-ratetestsshowedthecapacityfadeandratecapability lossestobehighlymitigatedforcellscontainingconductivepolymer-coatedsulfurincomparisontocellsusingtheuncoatedsulfur. Kineticinvestigationsbycyclicvoltammetryandelectrochemicalimpedancespectroscopyanalysesundoubtedlyconfirmimproved electronandLi-iontransportwithintheelectrodescontainingconductivepolymer-coatedsulfur.Theelectrochemicalperformance canberankedasPEDOT-S>PANI-S>PTs-S>PPy-S>rawsulfur | Keywords: | battery;sulfur;lithium;surface-modifiedpowder;conductivepolymers;atmosphericplasma | Document URI: | http://hdl.handle.net/1942/37352 | ISSN: | 2574-0962 | DOI: | https://doi.org/10.1021/acsaem.2c00270 | ISI #: | 000813125700001 | Rights: | 2022 AmericanChemicalSociety | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2023 |
| Appears in Collections: | Research publications |
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| acsaem.2c00270.pdf Restricted Access | Published version | 8.03 MB | Adobe PDF | View/Open Request a copy |
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