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Article: A novel electrode formed with electrospun nano- and micro-scale carbon fibers for aqueous redox flow batteries

TitleA novel electrode formed with electrospun nano- and micro-scale carbon fibers for aqueous redox flow batteries
Authors
KeywordsSpecific surface area
Pore size
Permeability
Dual-diameter carbon fiber
Electrospinning
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jpowsour
Citation
Journal of Power Sources, 2020, v. 470, p. article no. 228441 How to Cite?
AbstractThis work reports on a novel electrode prepared with electrospun nano- and micro-scale carbon fibers for aqueous redox flow batteries. Larger fibers, ~10 μm in diameter, form larger pores to provide pathways for electrolyte flow, while smaller fibers, ~1 μm in diameter, increase active surface area for redox reactions. Brunauer-Emmett-Teller and pressure drop tests show that the specific surface area of the prepared dual-diameter electrode is doubled as compared with the large-fiber electrode, while the estimated permeability is enhanced by 1.4 times as opposed to the small-fiber electrode. The application of the dual-diameter electrodes to a vanadium redox flow battery allows the battery to achieve an energy efficiency of 84.78% at the current density of 100 mA cm−2, which is 13.57% higher than that with small-fiber electrodes, and 3.91% higher than that with large-fiber electrodes. Even at a high current density of 200 mA cm−2, the battery with the prepared electrode can still maintain the energy efficiency of 74.18%, which is 5.5% higher than that with large-fiber electrodes, and the battery with small-fiber electrodes cannot be operated at such high current density. This dual-diameter fibrous structure provides inspirations for the future electrode design in aqueous redox flow batteries.
Persistent Identifierhttp://hdl.handle.net/10722/289735
ISSN
2019 Impact Factor: 8.247
2015 SCImago Journal Rankings: 2.008

 

DC FieldValueLanguage
dc.contributor.authorSun, J-
dc.contributor.authorJiang, HR-
dc.contributor.authorWu, MC-
dc.contributor.authorFan, XZ-
dc.contributor.authorChao, CYH-
dc.contributor.authorZhao, TS-
dc.date.accessioned2020-10-22T08:16:43Z-
dc.date.available2020-10-22T08:16:43Z-
dc.date.issued2020-
dc.identifier.citationJournal of Power Sources, 2020, v. 470, p. article no. 228441-
dc.identifier.issn0378-7753-
dc.identifier.urihttp://hdl.handle.net/10722/289735-
dc.description.abstractThis work reports on a novel electrode prepared with electrospun nano- and micro-scale carbon fibers for aqueous redox flow batteries. Larger fibers, ~10 μm in diameter, form larger pores to provide pathways for electrolyte flow, while smaller fibers, ~1 μm in diameter, increase active surface area for redox reactions. Brunauer-Emmett-Teller and pressure drop tests show that the specific surface area of the prepared dual-diameter electrode is doubled as compared with the large-fiber electrode, while the estimated permeability is enhanced by 1.4 times as opposed to the small-fiber electrode. The application of the dual-diameter electrodes to a vanadium redox flow battery allows the battery to achieve an energy efficiency of 84.78% at the current density of 100 mA cm−2, which is 13.57% higher than that with small-fiber electrodes, and 3.91% higher than that with large-fiber electrodes. Even at a high current density of 200 mA cm−2, the battery with the prepared electrode can still maintain the energy efficiency of 74.18%, which is 5.5% higher than that with large-fiber electrodes, and the battery with small-fiber electrodes cannot be operated at such high current density. This dual-diameter fibrous structure provides inspirations for the future electrode design in aqueous redox flow batteries.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jpowsour-
dc.relation.ispartofJournal of Power Sources-
dc.subjectSpecific surface area-
dc.subjectPore size-
dc.subjectPermeability-
dc.subjectDual-diameter carbon fiber-
dc.subjectElectrospinning-
dc.titleA novel electrode formed with electrospun nano- and micro-scale carbon fibers for aqueous redox flow batteries-
dc.typeArticle-
dc.identifier.emailChao, CYH: cyhchao@hku.hk-
dc.identifier.authorityChao, CYH=rp02396-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jpowsour.2020.228441-
dc.identifier.scopuseid_2-s2.0-85086509944-
dc.identifier.hkuros316094-
dc.identifier.volume470-
dc.identifier.spagearticle no. 228441-
dc.identifier.epagearticle no. 228441-
dc.publisher.placeNetherlands-

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