Facile Synthesis of Nb2O5@Carbon Core-Shell Nanocrystals with Controlled Crystalline Structure for High-Power Anodes in Hybrid Supercapacitors

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dc.contributor.authorLim, Eunhoko
dc.contributor.authorJo, Changshinko
dc.contributor.authorKim, Haegyeomko
dc.contributor.authorKim, Mok-Hwako
dc.contributor.authorMun, Yeongdongko
dc.contributor.authorChun, Jinyoungko
dc.contributor.authorYe, Youngjinko
dc.contributor.authorHwang, Jongkookko
dc.contributor.authorHa, Kyoung-Suko
dc.contributor.authorRoh, Kwang Chulko
dc.contributor.authorKang, Kisukko
dc.contributor.authorYoon, Songhunko
dc.contributor.authorLee, Jinwooko
dc.date.accessioned2018-08-20T08:09:58Z-
dc.date.available2018-08-20T08:09:58Z-
dc.date.created2018-08-08-
dc.date.created2018-08-08-
dc.date.created2018-08-08-
dc.date.issued2015-07-
dc.identifier.citationACS NANO, v.9, no.7, pp.7497 - 7505-
dc.identifier.issn1936-0851-
dc.identifier.urihttp://hdl.handle.net/10203/245035-
dc.description.abstractHybrid supercapacitors (battery-supercapacitor hybrid devices, HSCs) deliver high energy within seconds (excellent rate capability) with stable cyclability. One of the key limitations in developing high-performance HSCs is imbalance in power capability between the sluggish Faradaic lithium-intercalation anode and rapid non-Faradaic capacitive cathode. To solve this problem, we synthesize Nb2O5@carbon core-shell nanocyrstals (Nb2O5@C NCs) as high-power anode materials with controlled crystalline phases (orthorhombic (7) and pseudohexagonal (TT)) via a facile one-pot synthesis method based on a water-in-oil microemulsion system. The synthesis of ideal T-Nb2O5 for fast Li+ diffusion is simply achieved by controlling the microemulsion parameter (e.g., pH control). The T-Nb2O5@C NCs shows a reversible specific capacity of similar to 180 mA h g(-1) at 0.05 A g(-1) (1.1-3.0 V vs Li/Li+) with rapid rate capability compared to that of TT-Nb2O5@C and carbon shell-free Nb2O5 NCs, mainly due to synergistic effects of (i) the structural merit of T-Nb2O5 and (ii) the conductive carbon shell for high electron mobility. The highest energy (similar to 63 W h kg(-1)) and power (16 528 W kg(-1) achieved at similar to 5 W h kg(-1)) densities within the voltage range of 1.0-35 V of the HSC using T-Nb2O5@C anode and MSP-20 cathode are remarkable.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titleFacile Synthesis of Nb2O5@Carbon Core-Shell Nanocrystals with Controlled Crystalline Structure for High-Power Anodes in Hybrid Supercapacitors-
dc.typeArticle-
dc.identifier.wosid000358823200087-
dc.identifier.scopusid2-s2.0-84938152116-
dc.type.rimsART-
dc.citation.volume9-
dc.citation.issue7-
dc.citation.beginningpage7497-
dc.citation.endingpage7505-
dc.citation.publicationnameACS NANO-
dc.identifier.doi10.1021/acsnano.5b02601-
dc.contributor.localauthorLee, Jinwoo-
dc.contributor.nonIdAuthorLim, Eunho-
dc.contributor.nonIdAuthorJo, Changshin-
dc.contributor.nonIdAuthorKim, Haegyeom-
dc.contributor.nonIdAuthorKim, Mok-Hwa-
dc.contributor.nonIdAuthorMun, Yeongdong-
dc.contributor.nonIdAuthorChun, Jinyoung-
dc.contributor.nonIdAuthorYe, Youngjin-
dc.contributor.nonIdAuthorHwang, Jongkook-
dc.contributor.nonIdAuthorHa, Kyoung-Su-
dc.contributor.nonIdAuthorRoh, Kwang Chul-
dc.contributor.nonIdAuthorKang, Kisuk-
dc.contributor.nonIdAuthorYoon, Songhun-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthororthorhombic Nb2O5 nanocrystals-
dc.subject.keywordAuthorcontrolled crystal structures-
dc.subject.keywordAuthorcore-shell nanostructures-
dc.subject.keywordAuthorhigh-power anodes-
dc.subject.keywordAuthorhybrid supercapacitors-
dc.subject.keywordPlusLITHIUM-ION BATTERIES-
dc.subject.keywordPlusELECTROCHEMICAL ENERGY-STORAGE-
dc.subject.keywordPlusCARBIDE-DERIVED CARBON-
dc.subject.keywordPlusHIGH-PERFORMANCE ANODE-
dc.subject.keywordPlusNIOBIUM PENTOXIDE-
dc.subject.keywordPlusELECTRODE MATERIALS-
dc.subject.keywordPlusACTIVATED CARBON-
dc.subject.keywordPlusINTERCALATION PSEUDOCAPACITANCE-
dc.subject.keywordPlusNEGATIVE-ELECTRODE-
dc.subject.keywordPlusNB2O5 ELECTRODES-
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CBE-Journal Papers(저널논문)
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