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dc.contributor.author선양국-
dc.date.accessioned2018-04-03T04:40:50Z-
dc.date.available2018-04-03T04:40:50Z-
dc.date.issued2014-06-
dc.identifier.citationJOURNAL OF POWER SOURCES,256,p.479-484en_US
dc.identifier.issn0378-7753-
dc.identifier.issn1873-2755-
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S037877531400069X?via%3Dihub-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/56240-
dc.description.abstractCarbon-coated LiMnxFe1-xPO4 (x = 0, 0.5 and 1) is fully delithiated using NO2BF4 oxidant to investigate thermal behavior as a function of temperature as high as 700 degrees C in an Ar atmosphere. Reitveld refinement of X-ray diffraction (XRD) studies indicates readiness of chemical delithiation, except for Li0MnPO4, hydrated to amorphous MnPO4 center dot 2H(2)O. Thermal studies coupled with thermogravimetric analysis and in situ high temperature XRD demonstrate that the phase stability is affected by substituted Mn at an elevated temperature. The Li0FePO4 is stable up to 500 degrees C, maintaining the original olivine structure with a small amount of oxygen release. At higher temperatures, the phase was transformed to Fe-3(PO4)(2) and Fe2P2O7. In contrast, the phase transformation temperature is apparently reduced to as low as 200 degrees C by the addition of Mn into the crystal structure, which is related to the phase transformation to (Mn0.5Fe0.5)(3)(PO4)(2) associated with fast oxygen loss from the original structure. As a result, the better thermal stability of Li0FePO4 is attributed to less oxygen loss, which delays the phase transformation, resulting in less exothermic heat in the temperature range. (C) 2014 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipThis research was supported by the National Research Foundation of Korea funded by the Korean government (MEST) (NRF-2009-C1AAA001-0093307), the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0024683), and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) for the Center for Next Generation Dye-sensitized Solar Cells (No. 2008-0061903). This work was also partially supported by the IT R&D Program of MKE/KEIT (10041856).en_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSen_US
dc.subjectDelithiationen_US
dc.subjectOlivineen_US
dc.subjectThermal stabilityen_US
dc.subjectCathodeen_US
dc.subjectLithium batteryen_US
dc.titleThermal properties of fully delithiated olivinesen_US
dc.typeArticleen_US
dc.relation.volume256-
dc.identifier.doi10.1016/j.jpowsour.2014.01.046-
dc.relation.page479-484-
dc.relation.journalJOURNAL OF POWER SOURCES-
dc.contributor.googleauthorPark, Jae-Sang-
dc.contributor.googleauthorOh, Seung-Min-
dc.contributor.googleauthorSun, Yang-Kook-
dc.contributor.googleauthorMyung, Seung-Taek-
dc.relation.code2014034335-
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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