Block-Copolymer-Assisted One-Pot Synthesis of Ordered Mesoporous WO3-x/Carbon Nanocomposites as High-Rate-Performance Electrodes for Pseudocapacitors

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dc.contributor.authorJo, Changshinko
dc.contributor.authorHwang, Jongkookko
dc.contributor.authorSong, Hannahko
dc.contributor.authorDao, Anh Hako
dc.contributor.authorKim, Yong-Taeko
dc.contributor.authorLee, Sang Hyupko
dc.contributor.authorHong, Seok Wonko
dc.contributor.authorYoon, Songhunko
dc.contributor.authorLee, Jinwooko
dc.date.accessioned2018-08-20T08:24:07Z-
dc.date.available2018-08-20T08:24:07Z-
dc.date.created2018-08-08-
dc.date.created2018-08-08-
dc.date.issued2013-08-
dc.identifier.citationADVANCED FUNCTIONAL MATERIALS, v.23, no.30, pp.3747 - 3754-
dc.identifier.issn1616-301X-
dc.identifier.urihttp://hdl.handle.net/10203/245068-
dc.description.abstractAn ordered mesoporous tungsten-oxide/carbon (denoted as m-WO3-x-C-s) nanocomposite is synthesized using a simple one-pot method using polystyrene-block-poly(ethylene oxide) (PS-b-PEO) as a structure-directing agent. The hydrophilic PEO block interacts with the carbon and tungsten precursors (resol polymer and WCl6), and the PS block is converted to pores after heating at 700 degrees C under a nitrogen flow. The m-WO3-x-C-s nanocomposite has a high Brunauer-Emmett-Teller (BET) surface area and hexagonally ordered pores. Because of its mesoporous structure and high intrinsic density of tungsten oxide, this material exhibits a high average volumetric capacitance and gravimetric capacitance as a pseudocapacitor electrode. In comparison with reduced mesoporous tungsten oxide (denoted as m-WO3-x-h), which is synthesized by a tedious hard template approach and further reduction in a H-2/N-2 atmosphere, m-WO3-x-C-s shows a high capacitance and enhanced rate performance, as confirmed by cyclic voltammetry, galvanostatic charge/discharge measurements, and electrochemical impedance spectroscopy. The good performance of m-WO3-x-C-s is attributed to the high surface area arising from the mesoporous structure, the large interconnected mesopores, and the low internal resistance from the well-dispersed reduced tungsten oxide and amorphous carbon composite structure. Here, the amorphous carbon acts as an electrical pathway for effective pseudocapacitor behavior of WO3-x.-
dc.languageEnglish-
dc.publisherWILEY-V C H VERLAG GMBH-
dc.subjectELECTROCHEMICAL ENERGY-STORAGE-
dc.subjectDOUBLE-LAYER CAPACITORS-
dc.subjectIMPEDANCE SPECTROSCOPY-
dc.subjectCARBON-
dc.subjectSUPERCAPACITORS-
dc.subjectNANOWIRES-
dc.subjectNANOTUBES-
dc.subjectDESIGN-
dc.titleBlock-Copolymer-Assisted One-Pot Synthesis of Ordered Mesoporous WO3-x/Carbon Nanocomposites as High-Rate-Performance Electrodes for Pseudocapacitors-
dc.typeArticle-
dc.identifier.wosid000327490900004-
dc.identifier.scopusid2-s2.0-84881402937-
dc.type.rimsART-
dc.citation.volume23-
dc.citation.issue30-
dc.citation.beginningpage3747-
dc.citation.endingpage3754-
dc.citation.publicationnameADVANCED FUNCTIONAL MATERIALS-
dc.identifier.doi10.1002/adfm.201202682-
dc.contributor.localauthorLee, Jinwoo-
dc.contributor.nonIdAuthorJo, Changshin-
dc.contributor.nonIdAuthorHwang, Jongkook-
dc.contributor.nonIdAuthorSong, Hannah-
dc.contributor.nonIdAuthorDao, Anh Ha-
dc.contributor.nonIdAuthorKim, Yong-Tae-
dc.contributor.nonIdAuthorLee, Sang Hyup-
dc.contributor.nonIdAuthorHong, Seok Won-
dc.contributor.nonIdAuthorYoon, Songhun-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthormesoporous materials-
dc.subject.keywordAuthortungsten oxide-
dc.subject.keywordAuthorcarbon-
dc.subject.keywordAuthornanocomposites-
dc.subject.keywordAuthorelectrochemical capacitors-
dc.subject.keywordPlusELECTROCHEMICAL ENERGY-STORAGE-
dc.subject.keywordPlusDOUBLE-LAYER CAPACITORS-
dc.subject.keywordPlusIMPEDANCE SPECTROSCOPY-
dc.subject.keywordPlusCARBON-
dc.subject.keywordPlusSUPERCAPACITORS-
dc.subject.keywordPlusNANOWIRES-
dc.subject.keywordPlusNANOTUBES-
dc.subject.keywordPlusDESIGN-
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