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Article: N-doped graphene nanoplatelets as a highly active catalyst for Br2/Br− redox reactions in zinc-bromine flow batteries

TitleN-doped graphene nanoplatelets as a highly active catalyst for Br2/Br− redox reactions in zinc-bromine flow batteries
Authors
KeywordsN-doped graphene nanoplatelets
Zinc-bromine flow batteries
Br2/Br− redox reactions
Energy storage
Issue Date2019
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta
Citation
Electrochimica Acta, 2019, v. 318, p. 69-75 How to Cite?
AbstractThe low power density, due primarily to the sluggish reaction kinetic of Br2/Br−, is one of the main barriers that hinder the widespread application of zinc-bromine flow batteries (ZBFBs). Here, N-doped graphene nanoplatelets are synthesized by a facile method and applied as a catalyst for the Br2/Br− redox reactions. Electrochemical characterizations reveal that N-doped graphene nanoplatelets exhibit a remarkable catalytic activity toward Br2/Br− reactions, thus enabling the ZBFB to achieve an energy efficiency of as high as 84.2% at 80 mA cm−2, far surpassing those with the non-doped counterpart and pristine graphite-felt electrodes. More strikingly, even when the current density is raised up to 120 mA cm−2, the battery can still maintain an energy efficiency of 78.8%, which represents the highest performance for the ZBFBs reported in the open literature. Additionally, the ZBFB with the N-doped graphene nanoplatelets catalyst shows no degradation after 100 cycles. These superior results demonstrate that N-doped graphene nanoplatelets are an efficient and promising catalyst for high-performance bromine-based flow batteries. c
Persistent Identifierhttp://hdl.handle.net/10722/272842
ISSN
2017 Impact Factor: 5.116
2015 SCImago Journal Rankings: 1.391

 

DC FieldValueLanguage
dc.contributor.authorWu, MC-
dc.contributor.authorJiang, HR-
dc.contributor.authorZhang, RH-
dc.contributor.authorWei, L-
dc.contributor.authorChan, KY-
dc.contributor.authorZhao, TS-
dc.date.accessioned2019-08-06T09:17:36Z-
dc.date.available2019-08-06T09:17:36Z-
dc.date.issued2019-
dc.identifier.citationElectrochimica Acta, 2019, v. 318, p. 69-75-
dc.identifier.issn0013-4686-
dc.identifier.urihttp://hdl.handle.net/10722/272842-
dc.description.abstractThe low power density, due primarily to the sluggish reaction kinetic of Br2/Br−, is one of the main barriers that hinder the widespread application of zinc-bromine flow batteries (ZBFBs). Here, N-doped graphene nanoplatelets are synthesized by a facile method and applied as a catalyst for the Br2/Br− redox reactions. Electrochemical characterizations reveal that N-doped graphene nanoplatelets exhibit a remarkable catalytic activity toward Br2/Br− reactions, thus enabling the ZBFB to achieve an energy efficiency of as high as 84.2% at 80 mA cm−2, far surpassing those with the non-doped counterpart and pristine graphite-felt electrodes. More strikingly, even when the current density is raised up to 120 mA cm−2, the battery can still maintain an energy efficiency of 78.8%, which represents the highest performance for the ZBFBs reported in the open literature. Additionally, the ZBFB with the N-doped graphene nanoplatelets catalyst shows no degradation after 100 cycles. These superior results demonstrate that N-doped graphene nanoplatelets are an efficient and promising catalyst for high-performance bromine-based flow batteries. c-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta-
dc.relation.ispartofElectrochimica Acta-
dc.subjectN-doped graphene nanoplatelets-
dc.subjectZinc-bromine flow batteries-
dc.subjectBr2/Br− redox reactions-
dc.subjectEnergy storage-
dc.titleN-doped graphene nanoplatelets as a highly active catalyst for Br2/Br− redox reactions in zinc-bromine flow batteries-
dc.typeArticle-
dc.identifier.emailChan, KY: hrsccky@hku.hk-
dc.identifier.authorityChan, KY=rp00662-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.electacta.2019.06.064-
dc.identifier.scopuseid_2-s2.0-85067675575-
dc.identifier.hkuros300697-
dc.identifier.volume318-
dc.identifier.spage69-
dc.identifier.epage75-
dc.publisher.placeUnited Kingdom-

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