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dc.contributor.author선양국-
dc.date.accessioned2017-10-20T04:39:39Z-
dc.date.available2017-10-20T04:39:39Z-
dc.date.issued2015-12-
dc.identifier.citationJOURNAL OF THE ELECTROCHEMICAL SOCIETY, v. 162, NO 12, Page. 2313-2318en_US
dc.identifier.issn0013-4651-
dc.identifier.issn1945-7111-
dc.identifier.urihttp://jes.ecsdl.org/content/162/12/A2313-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/30146-
dc.description.abstractLi was incorporated into transition metal layers of Ni-rich Li[Ni0.95Co0.05]O-2 by formation of a solid solution with Li2MnO3 (layer notation: Li[Li(0.33)Mu(0.67)]O-2), which can be denoted as (1-x)Li[Ni0.95Co0.05]O-2 - xLi[Li(0.33)Mu(0.67)]O-2, to understand the effect of Li on the structure, electrochemistry and thermal characteristic of the cathode. Structural analysis data obtained by Rietveld refinement of X-ray diffraction data indicate that the additional Li can be found in the transition metal layers of (1-x)Li[Ni0.95Co0.05]O-2 - xLi[Li0.33Mn0.67]O-2. An interesting feature is that the average oxidation states of Ni and Mn are 3+ and 4+, respectively, for (1-x)Li[Ni0.95Co0.05]O-2 - xLi[Li0.33Mn0.67]O-2 as demonstrated by X-ray absorption study. The first discharge capacity was approximately 217 mAh g(-1), and the resulting retention was above 90% for 0.9Li[Ni0.95Co0.05]O-2 - 0.1Li[Li0.3Mn0.67]O-2 (Li[Li0.033Ni0.855Co0.045Mn0.067]O-2) in the range of 2.7 to 4.5 V for 100 cycles, which is a surprising result for Ni-rich compounds. Moreover, the thermal stability of (1-x)Li[Ni0.95Co0.05]O-2 - xLi[Li0.33Mn0.67]O-2 was significantly improved over the cathodes with identical Ni fraction. These results highlight the role of tetravalent Mn ions, even in small amounts, in stabilizing the electrochemical performances and thermal properties in the Ni-rich layer cathodes. (C) 2015 The Electrochemical Society.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 & Future Planning. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2014R1A2A1A13050479).en_US
dc.language.isoenen_US
dc.publisherELECTROCHEMICAL SOC INCen_US
dc.subjectPOSITIVE-ELECTRODE MATERIALSen_US
dc.subjectION BATTERIESen_US
dc.subjectSOLID-SOLUTIONen_US
dc.subjectLIFEen_US
dc.titleEffect of Lithium in Transition Metal Layers of Ni-Rich Cathode Materials on Electrochemical Propertiesen_US
dc.typeArticleen_US
dc.relation.no12-
dc.relation.volume162-
dc.identifier.doi10.1149/2.0531512jes-
dc.relation.page2313-2318-
dc.relation.journalJOURNAL OF THE ELECTROCHEMICAL SOCIETY-
dc.contributor.googleauthorChoi, Moon-Ho-
dc.contributor.googleauthorYoon, Chong Seung-
dc.contributor.googleauthorMyung, Seung-Taek-
dc.contributor.googleauthorLim, Byung-Beom-
dc.contributor.googleauthorKomaba, Shinichi-
dc.contributor.googleauthorSun, Yang-Kook-
dc.relation.code2015002636-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyksun-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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