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Song, Hyun-Kon
eclat: electrochemistry lab of advanced technology
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dc.citation.endPage 9072 -
dc.citation.number 7 -
dc.citation.startPage 9066 -
dc.citation.volume 14 - Kim, Jonghak - Lee, Jeongin - Jeong, Jinhyeon - Hwang, Chihyun - Song, Hyun-Kon - 2023-12-21T14:38:11Z - 2023-12-21T14:38:11Z - 2022-03-10 - 2022-02 -
dc.description.abstract Quinones having a fully conjugated cyclic dione structure have been used as redox mediators in electrochemistry. 2,5-Ditert-butyl-1,4-benzoquinone (DBBQ or DB-p-BQ) as a para-quinone derivative is one of the representative discharge redox mediators for facilitating the oxygen reduction reaction (ORR) kinetics in lithium-oxygen batteries (LOBs). Herein, we presented that the redox activity of DB-p-BQ for electron mediation was possibly used for facilitating superoxide disproportionation reaction (SODR) by tuning the isomeric config-uration of the carbonyl groups of the substituted quinone to change its reduction potentials. First, we expected a molecule having its reduction potential between oxygen/superoxide at 2.75 V versus Li/Li+ and superoxide/peroxide at 3.17 V to play a role of the SODR catalyst by transferring an electron from one superoxide (O-2(-)) to another superoxide to generate dioxygen (O2) and peroxide (O-2(2-)). By changing the isomeric configuration from para (DB-p-BQ) to ortho (DB-o-BQ), the reduction potential of the first electron transfer (Q/Q(-)) of the ditert-butyl benzoquinone shifted positively to the potential range of the SODR catalyst. The electrocatalytic SODR-promoting functionality of DB-o-BQ kept the reactive superoxide concentration below a harmful level to suppress superoxide-triggered side reaction, improving the cycling durability of LOBs, which was not achieved by the para form. The second electron transfer process (Q(-)/Q(2-)) of the DB-o-BQ, even if the same process of the para form was not used for facilitating ORR, played a role of mediating electrons between electrode and oxygen like the Q/Q(-) process of the para form. The ORR-promoting functionality of the ortho form increased the LOB discharge capacity and reduced the ORR overpotential. -
dc.identifier.bibliographicCitation ACS APPLIED MATERIALS & INTERFACES, v.14, no.7, pp.9066 - 9072 -
dc.identifier.doi 10.1021/acsami.1c22621 -
dc.identifier.issn 1944-8244 -
dc.identifier.scopusid 2-s2.0-85125058587 -
dc.identifier.uri -
dc.identifier.url -
dc.identifier.wosid 000758050100001 -
dc.language 영어 -
dc.publisher AMER CHEMICAL SOC -
dc.title Shifting Target Reaction from Oxygen Reduction to Superoxide Disproportionation by Tuning Isomeric Configuration of Quinone Derivative as Redox Mediator for Lithium-Oxygen Batteries -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Nanoscience & Nanotechnology; Materials Science, Multidisciplinary -
dc.relation.journalResearchArea Science & Technology - Other Topics; Materials Science -
dc.type.docType Article; Early Access -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor lithium-oxygen batteries -
dc.subject.keywordAuthor superoxide disproportionation -
dc.subject.keywordAuthor redox mediator -
dc.subject.keywordAuthor superoxide dismutase -
dc.subject.keywordAuthor catalyst -
dc.subject.keywordPlus REACTION-MECHANISM -
dc.subject.keywordPlus DISCHARGE -
dc.subject.keywordPlus ROLES -


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