Synthesis and Characterization of Porous Sulfur/MWCNTs Composites with Improved Performance and Safety as Cathodes for Li-S Batterie

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dc.contributor.authorStraková Fedorková, Andreacs
dc.contributor.authorKazda, Tomášcs
dc.contributor.authorGavalierova, Katarinacs
dc.contributor.authorGómez-Romero, Pedrocs
dc.contributor.authorShambel, Elenacs
dc.coverage.issue1cs
dc.coverage.volume13cs
dc.date.accessioned2020-08-04T10:59:59Z
dc.date.available2020-08-04T10:59:59Z
dc.date.issued2018-01-01cs
dc.description.abstractSulfur-carbon (S-C-MWCNTs) composites and sulfur-LiFePO4 (S-LFP-MWCNTs) composites were synthesised with MWCNTs additive by sulfur sublimation and solid state reaction. As prepared materials are characterized with scanning electron microscopy, thermogravimetry, FTIR, elemental analysis, XPS, cyclic voltammetry and galvanostatic charge/discharge tests. The composite S-LFP cathode with MWCNTs additive shows improved discharge capacity and performance. It shows an initial discharge capacity of 1167 mAh/g-sulfur, or 70% of theoretical capacity. The discharge capacity measured after 20 cycles for S-LFP-MWCNTs composite cathode was 80% of the initial capacity and remained stable. After 160 charge/discharge tests, the cathode displays a stable capacity of 561 mAh/g-sulfur at the C-rate of 0.2 C. Combination of sulfur, LiFePO4 and MWCNTs prevents aggregation and volume change of the cathode particles and improves the conductivity and electrochemical stability during the long-term cycling. 3-D FTIR spectroscopy measurements confirmed improved chemical stability and safety of sulfur composites also at higher temperatures.en
dc.formattextcs
dc.format.extent551-562cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationINTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE. 2018, vol. 13, issue 1, p. 551-562.en
dc.identifier.doi10.20964/2018.01.67cs
dc.identifier.issn1452-3981cs
dc.identifier.other146926cs
dc.identifier.urihttp://hdl.handle.net/11012/83840
dc.language.isoencs
dc.publisherESGcs
dc.relation.ispartofINTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCEcs
dc.relation.urihttp://www.electrochemsci.org/papers/vol13/130100551.pdfcs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1452-3981/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectSulfur composite cathodeen
dc.subjectLithium batteriesen
dc.subjectLiFePO4en
dc.subjectmulti-wall carbon nanotubesen
dc.titleSynthesis and Characterization of Porous Sulfur/MWCNTs Composites with Improved Performance and Safety as Cathodes for Li-S Batterieen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-146926en
sync.item.dbtypeVAVen
sync.item.insts2020.08.04 12:59:59en
sync.item.modts2020.08.04 12:24:12en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. oddělení-ETE-CVVOZEcs
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