3D Macroporous Graphene Frameworks for Supercapacitors with High Energy and Power Densities

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dc.contributor.authorChoi, Bong-Gillko
dc.contributor.authorYang, Min-Hoko
dc.contributor.authorHong, Won-Hiko
dc.contributor.authorChoi, Jang-Wookko
dc.contributor.authorHuh, Yun-Sukko
dc.date.accessioned2013-03-13T02:25:02Z-
dc.date.available2013-03-13T02:25:02Z-
dc.date.created2012-07-05-
dc.date.created2012-07-05-
dc.date.issued2012-05-
dc.identifier.citationACS NANO, v.6, no.5, pp.4020 - 4028-
dc.identifier.issn1936-0851-
dc.identifier.urihttp://hdl.handle.net/10203/104238-
dc.description.abstractIn order to develop energy storage devices with high power and energy densities, electrodes should hold well-defined pathways for efficient Ionic and electronic transport. Herein, we demonstrate high-performance supercapacitors by building a three-dimensional (3D) macroporous structure that consists of chemically modified graphene (CMG). These 3D macroporous electrodes, namely, embossed-CMG (e-CMG) films, were fabricated by using polystyrene colloidal particles as a sacrificial template. Furthermore, for further capacitance boost, a thin layer of MnO2 was additionally deposited onto e-CMG. The porous graphene structure with a large surface area facilitates fast ionic transport within the electrode while preserving decent electronic conductivity and thus endows MnO2/e-CMG composite electrodes with excellent electrochemical properties such as a specific capacitance of 389 F/g at 1 A/g and 97.7% capacitance retention upon a current Increase to 35 A/g. Moreover, when the MnO2/e-CMG composite electrode was asymmetrically assembled with an e-CMG electrode, the assembled full cell shows remarkable cell performance: energy density of 44 Wh/kg, power density of 25 kW/kg, and excellent cycle life.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.subjectPERFORMANCE ELECTROCHEMICAL CAPACITORS-
dc.subjectOXIDE-
dc.subjectFILMS-
dc.subjectSTORAGE-
dc.subjectULTRACAPACITORS-
dc.subjectELECTRODES-
dc.subjectNANOSHEETS-
dc.subjectMNO2-
dc.title3D Macroporous Graphene Frameworks for Supercapacitors with High Energy and Power Densities-
dc.typeArticle-
dc.identifier.wosid000304231700041-
dc.identifier.scopusid2-s2.0-84862894222-
dc.type.rimsART-
dc.citation.volume6-
dc.citation.issue5-
dc.citation.beginningpage4020-
dc.citation.endingpage4028-
dc.citation.publicationnameACS NANO-
dc.identifier.doi10.1021/nn3003345-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorHong, Won-Hi-
dc.contributor.localauthorChoi, Jang-Wook-
dc.contributor.nonIdAuthorYang, Min-Ho-
dc.contributor.nonIdAuthorHuh, Yun-Suk-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorporous material-
dc.subject.keywordAuthorgraphene-
dc.subject.keywordAuthorcomposites-
dc.subject.keywordAuthorion transport-
dc.subject.keywordAuthorenergy storage-
dc.subject.keywordPlusPERFORMANCE ELECTROCHEMICAL CAPACITORS-
dc.subject.keywordPlusOXIDE-
dc.subject.keywordPlusFILMS-
dc.subject.keywordPlusSTORAGE-
dc.subject.keywordPlusULTRACAPACITORS-
dc.subject.keywordPlusELECTRODES-
dc.subject.keywordPlusNANOSHEETS-
dc.subject.keywordPlusMNO2-
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