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dc.contributor.author선양국-
dc.date.accessioned2017-04-24T06:14:40Z-
dc.date.available2017-04-24T06:14:40Z-
dc.date.issued2015-08-
dc.identifier.citationJOURNAL OF POWER SOURCES, v. 288, Page. 376-383en_US
dc.identifier.issn0378-7753-
dc.identifier.issn1873-2755-
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S0378775315008149-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/26900-
dc.description.abstractThis paper introduces a novel, efficient method for the synthesis of TiOF2, and outlines the mechanisms of TiOF2 on discharge (reduction) and charge (oxidation). Anatase TiO2 is reacted with hydrofluoric acid, HF, to produce TiOF2. The synthesized TiOF2 is crystallized into a cubic perovskite structure with a Pm3m space group, as confirmed by Rietveld refinement of X-ray diffraction data. The particles show peculiar cubic-shaped secondary particle morphology. Electrochemical investigation indicated that the TiOF2 delivers a high charge capacity 526 mAh g(-1). X-ray diffraction, X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and transmission electron microscopy are employed to elucidate the reaction process. During lithiation, TiOF2 adopts Li+ ions into the cubic perovskite structure to form LiTiOF2, and the phase separates to LiF and TiO by further lithiation. The formed TiO is oxidized to TiO2 during charging although those oxides are in an amorphous state. The electrochemical reaction seems to be fairly stable, retaining 94.5% of its capacity during 100 cycles, starting from the second cycle. Also, the electrode is suitable for operation at high rates, namely, 400 mAh g(-1) at 200 mA g(-1), 345 mAh g(-1) at 1.6 A g(-1), and 288 mAh g(-1) at 3.2 A g(-1). 2015 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipThis research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2009-0093467 and NRF-2014R1A2A1A11051197). This work was also supported by the IT R&D program of MKE/KEIT (10041856 and 10041094).en_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.subjectTitaniaen_US
dc.subjectHydrofluoric aciden_US
dc.subjectTitanium oxyfluorideen_US
dc.subjectAnodeen_US
dc.subjectLithiumen_US
dc.subjectBatteryen_US
dc.titleA new synthetic method of titanium oxyfluoride and its application as an anode material for rechargeable lithium batteriesen_US
dc.typeArticleen_US
dc.relation.volume288-
dc.identifier.doi10.1016/j.jpowsour.2015.04.146-
dc.relation.page376-383-
dc.relation.journalJOURNAL OF POWER SOURCES-
dc.contributor.googleauthorMyung, Seung-Taek-
dc.contributor.googleauthorKikuchi, Masaru-
dc.contributor.googleauthorYoon, Chong Seung-
dc.contributor.googleauthorYashiro, Hitoshi-
dc.contributor.googleauthorSun, Yang-Kook-
dc.relation.code2015001360-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyksun-
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COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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