A Mesoporous Tungsten Oxynitride Nanofibers/Graphite Felt Composite Electrode with High Catalytic Activity for the Cathode in Zn-Br Flow Battery

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dc.contributor.authorJung, HyunJinko
dc.contributor.authorLee, JaeHyukko
dc.contributor.authorPark, JaeYunko
dc.contributor.authorShin, Kyungjaeko
dc.contributor.authorKim, Hee-Takko
dc.contributor.authorCho, EunAeko
dc.date.accessioned2023-07-28T05:00:11Z-
dc.date.available2023-07-28T05:00:11Z-
dc.date.created2023-04-17-
dc.date.issued2023-07-
dc.identifier.citationSMALL, v.19, no.30-
dc.identifier.issn1613-6810-
dc.identifier.urihttp://hdl.handle.net/10203/310938-
dc.description.abstractHigh electrochemical polarization during a redox reaction in the electrode of aqueous zinc-bromine flow batteries largely limits its practical implementation as an effective energy storage system. This study demonstrates a rationally-designed composite electrode that exhibits a lower electrochemical polarization by providing a higher number of catalytically-active sites for faster bromine reaction, compared to a conventional graphite felt cathode. The composite electrode is composed of electrically-conductive graphite felt (GF) and highly active mesoporous tungsten oxynitride nanofibers (mWONNFs) that are prepared by electrospinning and simple heat treatments. Addition of the 1D mWONNFs to porous GF produces a web-like structure that significantly facilitates the reaction kinetics and ion diffusion. The cell performance achieves in this study demonstrated high energy efficiencies of 89% and 80% at current densities of 20 and 80 mA cm(-2), respectively. Furthermore, the cell can also be operated at a very high current density of 160 mA cm(-2), demonstrating an energy efficiency of 62%. These results demonstrate the effectiveness of the mWONNF/GF composite as the electrode material in zinc-bromine flow batteries.-
dc.languageEnglish-
dc.publisherWILEY-V C H VERLAG GMBH-
dc.titleA Mesoporous Tungsten Oxynitride Nanofibers/Graphite Felt Composite Electrode with High Catalytic Activity for the Cathode in Zn-Br Flow Battery-
dc.typeArticle-
dc.identifier.wosid000956490900001-
dc.identifier.scopusid2-s2.0-85150999295-
dc.type.rimsART-
dc.citation.volume19-
dc.citation.issue30-
dc.citation.publicationnameSMALL-
dc.identifier.doi10.1002/smll.202208280-
dc.contributor.localauthorKim, Hee-Tak-
dc.contributor.localauthorCho, EunAe-
dc.contributor.nonIdAuthorJung, HyunJin-
dc.contributor.nonIdAuthorLee, JaeHyuk-
dc.contributor.nonIdAuthorPark, JaeYun-
dc.contributor.nonIdAuthorShin, Kyungjae-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthordensity functional theory (DFT) calculations-
dc.subject.keywordAuthorhigh catalytic activity-
dc.subject.keywordAuthormesoporous tungsten oxynitride nanofibers-
dc.subject.keywordAuthorsynergetic interconnected composite-
dc.subject.keywordAuthorzinc bromine flow batteries-
dc.subject.keywordPlusOXYGEN-REDUCTION-
dc.subject.keywordPlusRECENT PROGRESS-
dc.subject.keywordPlusREDOX COUPLE-
dc.subject.keywordPlusNANOTUBES-
dc.subject.keywordPlusOXIDE-
dc.subject.keywordPlusNANOPARTICLES-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordPlusNANOWIRES-
dc.subject.keywordPlusCARBON-
dc.subject.keywordPlusAREA-
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CBE-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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