Scalable exfoliation and activation of graphite into porous graphene using microwaves for high-performance supercapacitors

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dc.contributor.authorKang, Heon Gyuko
dc.contributor.authorJeong, Jae-Minko
dc.contributor.authorHong, Seok Bokko
dc.contributor.authorLee, Geun Youngko
dc.contributor.authorKim, Do Hyunko
dc.contributor.authorKim, Jung Wonko
dc.contributor.authorChoi, Bong Gillko
dc.date.accessioned2018-12-20T01:46:54Z-
dc.date.available2018-12-20T01:46:54Z-
dc.date.created2018-11-26-
dc.date.created2018-11-26-
dc.date.created2018-11-26-
dc.date.created2018-11-26-
dc.date.issued2019-01-
dc.identifier.citationJOURNAL OF ALLOYS AND COMPOUNDS, v.770, pp.458 - 465-
dc.identifier.issn0925-8388-
dc.identifier.urihttp://hdl.handle.net/10203/247112-
dc.description.abstractActivated few-layered graphene (a-FLG) materials with porous structures are prepared using a KOH-assisted microwave irradiation technique from natural graphite. The employment of KOH as a chemical etchant efficiently activates the surface pore structure of graphene during the exfoliation of graphite exposed to microwave irradiation. The resultant a-FLG materials exhibit favorable and tailorable large surface areas and porous structures for the deposition of electrochemically active MnO2. When measuring electrochemical characteristics, MnO2/a-FLG exhibits a high specific capacitance (265 F/g), high rate capability, and excellent long-term stability. Moreover, asymmetric supercapacitor devices fabricated using a-FLG as a negative electrode and MnO2/a-FLG as a positive electrode show high energy (40.8 Wh/kg) and power (16.3 kW/kg) densities with high capacitance retention (96% over 10000 cycles). (C) 2018 Elsevier B.V. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE SA-
dc.titleScalable exfoliation and activation of graphite into porous graphene using microwaves for high-performance supercapacitors-
dc.typeArticle-
dc.identifier.wosid000449486300055-
dc.identifier.scopusid2-s2.0-85051989582-
dc.type.rimsART-
dc.citation.volume770-
dc.citation.beginningpage458-
dc.citation.endingpage465-
dc.citation.publicationnameJOURNAL OF ALLOYS AND COMPOUNDS-
dc.identifier.doi10.1016/j.jallcom.2018.08.042-
dc.contributor.localauthorKim, Do Hyun-
dc.contributor.nonIdAuthorKang, Heon Gyu-
dc.contributor.nonIdAuthorHong, Seok Bok-
dc.contributor.nonIdAuthorLee, Geun Young-
dc.contributor.nonIdAuthorKim, Jung Won-
dc.contributor.nonIdAuthorChoi, Bong Gill-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorSupercapacitor-
dc.subject.keywordAuthorMnO2-
dc.subject.keywordAuthorGraphene-
dc.subject.keywordAuthorActivation-
dc.subject.keywordAuthorExfoliation-
dc.subject.keywordPlusCARBON NANOTUBES-
dc.subject.keywordPlusSTORAGE DEVICES-
dc.subject.keywordPlusOXIDE-
dc.subject.keywordPlusENERGY-
dc.subject.keywordPlusELECTROLYTES-
dc.subject.keywordPlusIRRADIATION-
dc.subject.keywordPlusCAPACITORS-
dc.subject.keywordPlusHYDROGEL-
dc.subject.keywordPlusDESIGN-
dc.subject.keywordPlusFILMS-
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