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Jeong, Gyoung Hwa
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Fabrication of β-CoV3O8 nanorods embedded in graphene sheets and their application for electrochemical charge storage electrode

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dc.contributor.author Jeong, Gyoung Hwa ko
dc.contributor.author Lee, Ilbok ko
dc.contributor.author Lee, Donghyun ko
dc.contributor.author Lee, Hea-Min ko
dc.contributor.author Baek, Seungmin ko
dc.contributor.author Kwon, O-Phil ko
dc.contributor.author Kumta, Prashant N. ko
dc.contributor.author Yoon, Songhun ko
dc.contributor.author Kim, Sang-Wook ko
dc.date.available 2018-03-22T06:37:48Z -
dc.date.created 2018-02-26 ko
dc.date.issued 2018-03 ko
dc.identifier.citation NANOTECHNOLOGY, v.29, no.19, pp.195403 ko
dc.identifier.issn 0957-4484 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/23859 -
dc.description.abstract Fabrication of β-CoV3O8 nanorods embedded in graphene sheets and its application as electrochemical charge storage electrodes is reported. From surfactant treatment of raw graphite, graphene was directly prepared and its nanocomposite with β-CoV3O8 nanorods distributed between graphene layers (β-CoV3O8-G) was synthesized by hydrothermal method. When applied as anode in lithium-ion batteries, the β-CoV3O8-G anode exhibits greatly improved charge and discharge capacities of 790 and 627 mAhbold dotg-1, respectively, with unexpectedly high initial efficiency of 82%. The observed discharge capacity reflected that at least 3.7 mol of Li+ is selectively accumulated within the β-CoV3O8 phase (LixCoV3O8, x > 3.7), indicative of significantly improved Li+ uptake when compared with aggregated β-CoV3O8 nanorods. Moreover, very distinct peak plateaus and greatly advanced cycling performance are observed, showing more improved Li+ storage within the β-CoV3O8 phase. As a supercapacitor electrode, moreover, our composite electrode exhibits very high peak pseudocapacitances of 2.71 Fbold dotcm−2 and 433.65 Fbold dotg−1 in β-CoV3O8 phase with extremely stable cycling performance. These remarkably enhanced performances in the individual electrochemical charge storage electrodes are attributed to the novel phase formation of β-CoV3O8 and its optimized nanocomposite structure with graphene, which yield fast electrical conduction through graphene, easy accessibility of ions through the open multilayer nanosheet-structure, and a relaxation space between the β-CoV3O8-G. ko
dc.language 영어 ko
dc.publisher IOP PUBLISHING LTD ko
dc.title Fabrication of β-CoV3O8 nanorods embedded in graphene sheets and their application for electrochemical charge storage electrode ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85044022583 ko
dc.identifier.wosid 000427614500003 ko
dc.type.rims ART ko
dc.identifier.doi 10.1088/1361-6528/aaae3e ko
dc.identifier.url http://iopscience.iop.org/article/10.1088/1361-6528/aaae3e ko
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