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DC Field | Value | Language |
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dc.citation.endPage | 9072 | - |
dc.citation.number | 7 | - |
dc.citation.startPage | 9066 | - |
dc.citation.title | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.volume | 14 | - |
dc.contributor.author | Kim, Jonghak | - |
dc.contributor.author | Lee, Jeongin | - |
dc.contributor.author | Jeong, Jinhyeon | - |
dc.contributor.author | Hwang, Chihyun | - |
dc.contributor.author | Song, Hyun-Kon | - |
dc.date.accessioned | 2023-12-21T14:38:11Z | - |
dc.date.available | 2023-12-21T14:38:11Z | - |
dc.date.created | 2022-03-10 | - |
dc.date.issued | 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 | https://scholarworks.unist.ac.kr/handle/201301/61159 | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/acsami.1c22621 | - |
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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