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dc.contributor.author선양국-
dc.date.accessioned2017-06-08T05:04:03Z-
dc.date.available2017-06-08T05:04:03Z-
dc.date.issued2015-09-
dc.identifier.citationNANO ENERGY, v. 16, Page. 218-226en_US
dc.identifier.issn2211-2855-
dc.identifier.issn2211-3282-
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S2211285515002712-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/27691-
dc.description.abstractThe main disadvantage of using transition metal oxides for Na+-ion batteries is the sluggish kinetics of insertion of Na+ ions into the structure. Here, we introduce nanosized anatase TiO2 that is partially doped with fluorine (TiO2-delta F delta) to form electro-conducting trivalent Ti3+ as an ultrafast Na+ insertion material for use as an anode for sodium-ion batteries. In addition, the F-doped TiO2-delta F delta is modified by electro-conducting carbon nanotubes (CNTs) to further enhance the electric conductivity. The composite F-doped TiO2 embedded in CNTs is produced in a one-pot hydrothermal reaction. X-ray diffraction and microscopic studies revealed that nanocrystalline anatase-type TiO2-delta F delta particles, in which fluorine is present with TiO2 particles, are loaded on the CNTs. This yields a high electric conductivity of approximately 5.8 S cm(-1). The first discharge capacity of the F-doped TiO2 embedded in CNTs is approximately 250 mA h (g-oxide)(-1), and is retained at 97% after 100 cycles. As expected, a high-rate performance was achieved even at the 100 C discharging rate (25 A g(-1)) where the composite material demonstrated a capacity of 118 mA h g(-1) under the 0.1 C-rate charge condition. The present work also highlights a significant improvement in the insertion and extraction of Na+ ions when the material was charged and discharged under the same rate of 35 C (8.75 A g(-1)), delivering approximately 90 mA h (g-oxide)(-1). (C) 2015 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipThis work was supported by the Global Frontier R&D Program (2013M3A6B1078875) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT and Future Planning and by a Human Resources Development program (No. 20124010203310) of a Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea Government Ministry of Trade, Industry and Energy. The authors thank Qatar Foundation for supporting this work.en_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.subjectAnatase TiO2en_US
dc.subjectCarbon nanotubesen_US
dc.subjectNanocrystallineen_US
dc.subjectAnodeen_US
dc.subjectSodium batteriesen_US
dc.titleUltrafast sodium storage in anatase TiO2 nanoparticles embedded on carbon nanotubesen_US
dc.typeArticleen_US
dc.relation.volume16-
dc.identifier.doi10.1016/j.nanoen.2015.06.017-
dc.relation.page218-226-
dc.relation.journalNANO ENERGY-
dc.contributor.googleauthorHwang, Jang-Yeon-
dc.contributor.googleauthorMyung, Seung-Taek-
dc.contributor.googleauthorLee, Joo-Hyeong-
dc.contributor.googleauthorAbouimrane, Ali-
dc.contributor.googleauthorBelharouak, Ilias-
dc.contributor.googleauthorSun, Yang-Kook-
dc.relation.code2015008094-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyksun-
dc.identifier.orcidhttp://orcid.org/0000-0002-0117-0170-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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