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dc.contributor.author서경도-
dc.date.accessioned2016-12-13T01:23:58Z-
dc.date.available2016-12-13T01:23:58Z-
dc.date.issued2015-05-
dc.identifier.citationRSC ADVANCES, v. 5, Page. 42990-42996en_US
dc.identifier.issn2046-2069-
dc.identifier.urihttp://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA05732A#!divAbstract-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/24816-
dc.description.abstractIn this study, we propose a fabrication method for highly monodisperse magnetite/carbon (Fe3O4/C) composite microspheres with a mesoporous structure. Highly monodisperse porous polystyrene (PS) microspheres are synthesized by traditional seeded polymerization. Textural properties of porous PS microspheres can be controlled by using different amounts of diluent. In order to carbonize and introduce ferrous (Fe2+) and ferric (Fe3+) ions into the pores of PS microspheres, the sulfonation reaction is carried out using sulfuric acid. Fe3O4 nanocrystals are formed in the pores as well as on the surface of the sulfonated porous PS microspheres by a simple wet chemical method. The obtained mesoporous structure of the Fe3O4/C composite microspheres is still retained after a heat treatment in a nitrogen atmosphere. The homogeneous distribution of Fe3O4 nanocrystals in the porous carbon matrix was analyzed through elemental mapping by preparing cross-sections using focused ion beam scanning electron microscopy milling. When the composite electrodes are tested as an anode material in a Li-ion half-cell, the mesoporous Fe3O4/C composite microspheres exhibit not only a high reversible capacity of 562 mA h g(-1) after 100 cycles at 1 C but also good capacity retention at various current rates (0.1-10 C) with a high coulombic efficiency of above 99%.en_US
dc.description.sponsorshipThis work was supported by a grant from the Human Resources Development Program of KETEP, funded by the Ministry of Trade, Industry and Energy, Korea (no. 20124010203290).en_US
dc.language.isoenen_US
dc.publisherROYAL SOC CHEMISTRYen_US
dc.subjectFE3O4 NANOCRYSTALSen_US
dc.subjectNEGATIVE-ELECTRODEen_US
dc.subjectALPHA-FE2O3en_US
dc.subjectPARTICLESen_US
dc.titleHighly monodisperse magnetite/carbon composite microspheres with a mesoporous structure as high-performance lithium-ion battery anodesen_US
dc.typeArticleen_US
dc.relation.volume5-
dc.identifier.doi10.1039/c5ra05732a-
dc.relation.page42990-42996-
dc.relation.journalRSC ADVANCES-
dc.contributor.googleauthorLim, Hyung-Seok-
dc.contributor.googleauthorKim, Daun-
dc.contributor.googleauthorHwang, Jun-Ki-
dc.contributor.googleauthorKim, Yu-Jeong-
dc.contributor.googleauthorSun, Yang-Kook-
dc.contributor.googleauthorSuh, Kyung-Do-
dc.relation.code2015011569-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF CHEMICAL ENGINEERING-
dc.identifier.pidkdsuh-
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COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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