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dc.contributor.author Lee, Byong-June -
dc.contributor.author Kang, Tong-Hyun -
dc.contributor.author Lee, Ha-Young -
dc.contributor.author Samdani, Jitendra -
dc.contributor.author Jung, Yongju -
dc.contributor.author Zhang, Chunfei -
dc.contributor.author Yu, Zhou -
dc.contributor.author Xu, Gui-Liang -
dc.contributor.author Cheng, Lei -
dc.contributor.author Byun, Seoungwoo -
dc.contributor.author Lee, Yong Min -
dc.contributor.author Amine, Khalil -
dc.contributor.author Yu, Jong-Sung -
dc.date.accessioned 2020-06-05T08:56:57Z -
dc.date.available 2020-06-05T08:56:57Z -
dc.date.created 2020-05-08 -
dc.date.issued 2020-06 -
dc.identifier.issn 1614-6832 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/11898 -
dc.description.abstract Despite their high theoretical energy density and low cost, lithium–sulfur batteries (LSBs) suffer from poor cycle life and low energy efficiency owing to the polysulfides shuttle and the electronic insulating nature of sulfur. Conductivity and polarity are two critical parameters for the search of optimal sulfur host materials. However, their role in immobilizing polysulfides and enhancing redox kinetics for long-life LSBs are not fully understood. This work has conducted an evaluation on the role of polarity over conductivity by using a polar but nonconductive platelet ordered mesoporous silica (pOMS) and its replica platelet ordered mesoporous carbon (pOMC), which is conductive but nonpolar. It is found that the polar pOMS/S cathode with a sulfur mass fraction of 80 wt% demonstrates outstanding long-term cycle stability for 2000 cycles even at a high current density of 2C. Furthermore, the pOMS/S cathode with a high sulfur loading of 6.5 mg cm−2 illustrates high areal and volumetric capacities with high capacity retention. Complementary physical and electrochemical probes clearly show that surface polarity and structure are more dominant factors for sulfur utilization efficiency and long-life, while the conductivity can be compensated by the conductive agent involved as a required electrode material during electrode preparation. The present findings shed new light on the design principles of sulfur hosts towards long-life and highly efficient LSBs. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim -
dc.language English -
dc.publisher Wiley-VCH Verlag -
dc.title Revisiting the Role of Conductivity and Polarity of Host Materials for Long-Life Lithium-Sulfur Battery -
dc.type Article -
dc.identifier.doi 10.1002/aenm.201903934 -
dc.identifier.scopusid 2-s2.0-85083770989 -
dc.identifier.bibliographicCitation Advanced Energy Materials, v.10, no.22, pp.1903934 -
dc.description.isOpenAccess FALSE -
dc.subject.keywordAuthor cycle stability -
dc.subject.keywordAuthor lithium-sulfur batteries -
dc.subject.keywordAuthor mesoporous silica -
dc.subject.keywordAuthor polarity -
dc.subject.keywordAuthor sulfur hosts -
dc.subject.keywordPlus COMPOSITE CATHODE MATERIALS -
dc.subject.keywordPlus ORDERED MESOPOROUS CARBON -
dc.subject.keywordPlus RATE CAPABILITY -
dc.subject.keywordPlus S BATTERIES -
dc.subject.keywordPlus PERFORMANCE -
dc.subject.keywordPlus SHELL -
dc.subject.keywordPlus NANOPARTICLES -
dc.subject.keywordPlus STRATEGIES -
dc.subject.keywordPlus SEPARATOR -
dc.subject.keywordPlus DIFFUSION -
dc.citation.number 22 -
dc.citation.startPage 1903934 -
dc.citation.title Advanced Energy Materials -
dc.citation.volume 10 -

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