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dc.contributor.authorSun, Zixuen_US
dc.contributor.authorVijay, Sudarshanen_US
dc.contributor.authorHeenen, Hendrik H.en_US
dc.contributor.authorEng, Alex Yong Shengen_US
dc.contributor.authorTu, Wenguangen_US
dc.contributor.authorZhao, Yunxingen_US
dc.contributor.authorKoh, See Weeen_US
dc.contributor.authorGao, Pingqien_US
dc.contributor.authorSeh, Zhi Weien_US
dc.contributor.authorChan, Karenen_US
dc.contributor.authorLi, Hongen_US
dc.identifier.citationSun, Z., Vijay, S., Heenen, H. H., Eng, A. Y. S., Tu, W., Zhao, Y., . . . Li, H. (2020). Catalytic polysulfide conversion and physiochemical confinement for lithium–sulfur batteries. Advanced Energy Materials, 10(22), 1904010-. doi:10.1002/aenm.201904010en_US
dc.description.abstractThe lithium–sulfur (Li–S) battery is widely regarded as a promising energy storage device due to its low price and the high earth-abundance of the materials employed. However, the shuttle effect of lithium polysulfides (LiPSs) and sluggish redox conversion result in inefficient sulfur utilization, low power density, and rapid electrode deterioration. Herein, these challenges are addressed with two strategies 1) increasing LiPS conversion kinetics through catalysis, and 2) alleviating the shuttle effect by enhanced trapping and adsorption of LiPSs. These improvements are achieved by constructing double-shelled hollow nanocages decorated with a cobalt nitride catalyst. The N-doped hollow inner carbon shell not only serves as a physiochemical absorber for LiPSs, but also improves the electrical conductivity of the electrode; significantly suppressing shuttle effect. Cobalt nitride (Co4N) nanoparticles, embedded in nitrogen-doped carbon in the outer shell, catalyze the conversion of LiPSs, leading to decreased polarization and fast kinetics during cycling. Theoretical study of the Li intercalation energetics confirms the improved catalytic activity of the Co4N compared to metallic Co catalyst. Altogether, the electrode shows large reversible capacity (1242 mAh g−1 at 0.1 C), robust stability (capacity retention of 658 mAh g−1 at 5 C after 400 cycles), and superior cycling stability at high sulfur loading (4.5 mg cm−2).en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.relation.ispartofAdvanced Energy Materialsen_US
dc.rightsThis is the accepted version of the following article: Sun, Z., Vijay, S., Heenen, H. H., Eng, A. Y. S., Tu, W., Zhao, Y., . . . Li, H. (2020). Catalytic polysulfide conversion and physiochemical confinement for lithium–sulfur batteries. Advanced Energy Materials, 1904010-, which has been published in final form at This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [].en_US
dc.subjectEngineering::Electrical and electronic engineeringen_US
dc.titleCatalytic polysulfide conversion and physiochemical confinement for lithium–sulfur batteriesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.contributor.organizationCentre for Micro-/Nano-electronics (NOVITAS)en_US
dc.contributor.organizationCINTRA CNRS/NTU/THALESen_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsCatalytic Polysulfide Conversionen_US
dc.subject.keywordsDensity Functional Theoryen_US
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