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dc.contributor.authorGuo, Yuqien_US
dc.contributor.authorChua, Rodneyen_US
dc.contributor.authorChen, Yingqianen_US
dc.contributor.authorCai, Yien_US
dc.contributor.authorTang, Ernest Jun Jieen_US
dc.contributor.authorLim, Nicholas J. J.en_US
dc.contributor.authorTran, Thu Haen_US
dc.contributor.authorVerma, Viveken_US
dc.contributor.authorWong, Ming Wahen_US
dc.contributor.authorSrinivasan, Madhavien_US
dc.identifier.citationGuo, Y., Chua, R., Chen, Y., Cai, Y., Tang, E. J. J., Lim, N. J. J., Tran, T. H., Verma, V., Wong, M. W. & Srinivasan, M. (2023). Hybrid electrolyte design for high-performance zinc–sulfur battery. Small, e2207133-.
dc.description.abstractRechargeable aqueous Zn/S batteries exhibit high capacity and energy density. However, the long-term battery performance is bottlenecked by the sulfur side reactions and serious Zn anode dendritic growth in the aqueous electrolyte medium. This work addresses the problem of sulfur side reactions and zinc dendrite growth simultaneously by developing a unique hybrid aqueous electrolyte using ethylene glycol as a co-solvent. The designed hybrid electrolyte enables the fabricated Zn/S battery to deliver an unprecedented capacity of 1435 mAh g-1 and an excellent energy density of 730 Wh kg-1 at 0.1 Ag-1 . In addition, the battery exhibits capacity retention of 70% after 250 cycles even at 3 Ag-1 . Moreover, the cathode charge-discharge mechanism studies demonstrate a multi-step conversion reaction. During discharge, the elemental sulfur is sequentially reduced by Zn to S2- ( S8→Sx2-→S22-+S2-)${{\rm{S}}_8}{\bm{ \to }}{\rm{S}}_{\rm{x}}^{2{\bm{ - }}}{\bm{ \to }}{\rm{S}}_2^{2{\bm{ - }}}{\bm{ + }}{{\rm{S}}^{2{\bm{ - }}}})$ , forming ZnS. On charging, the ZnS and short-chain polysulfides will oxidize back to elemental sulfur. This electrolyte design strategy and unique multi-step electrochemistry of the Zn/S system provide a new pathway in tackling both key issues of Zn dendritic growth and sulfur side reactions, and also in designing better Zn/S batteries in the future.en_US
dc.description.sponsorshipAgency for Science, Technology and Research (A*STAR)en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.rights© 2023 Wiley-VCH GmbH. All rights reserved.en_US
dc.titleHybrid electrolyte design for high-performance zinc–sulfur batteryen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.researchEnergy Research Institute @ NTU (ERI@N)en_US
dc.subject.keywordsAqueous Batteriesen_US
dc.subject.keywordsConversion Mechanismen_US
dc.description.acknowledgementThe authors acknowledge the grant from the National Research Foundation of Singapore (NRF) Investigatorship Award NRFI2017-08/NRF2016NRF-NRFI001-22 and A*STAR under the Advanced Manufacturing and Engineering (AME) programmatic fund number A20H3g2140.en_US
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