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dc.contributor.author이윤정-
dc.date.accessioned2018-03-19T02:46:32Z-
dc.date.available2018-03-19T02:46:32Z-
dc.date.issued2014-10-
dc.identifier.citationChemistry of Materials , 2014, 26(20), P.5973-5979en_US
dc.identifier.isbn1520-5002-
dc.identifier.issn0897-4756-
dc.identifier.urihttps://pubs.acs.org/doi/10.1021/cm502774u-
dc.description.abstractCore?shell, nickel-rich layered oxide materials with a full concentration gradient (FCG) core and thin shells with low nickel content have been investigated. Hierarchically structured core?shell materials have the same FCG core, where the composition gradually changes from Li[Ni0.86Co0.07Mn0.07]O2 to Li[Ni0.67Co0.09Mn0.24]O2 from the center to the outer surface. A thin shell composed of either Li[Ni0.48Co0.26Mn0.26]O2 or Li[Ni0.56Co0.18Mn0.26]O2 was applied to the outer surface of the FCG core. This hierarchical core?shell structure efficiently integrates the benefit of high energy from the Ni-rich core, structural stability and favorable transport of Li+ ions from the FCG core, and surface stability from the low-Ni and high-Mn shell. The core?shell cathodes demonstrate improved cycling performance at 55 °C even up to 4.5 V when compared to the FCG core-only cathode. Shells of low nickel content and a thickness of ∼300 nm provide sufficient surface stability, particularly at elevated temperatures. We suggest this novel core?shell structure as a suitable cathode for power sources such as electric vehicles, where safety and energy density are equally important.en_US
dc.description.sponsorshipThis work was mainly supported by Global Frontier R&D Program (2013-073298) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT & Future Planning and the partially support Human Resources Development program (No. 20124010203290) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy.en_US
dc.language.isoenen_US
dc.publisherAmer Chemical SOCen_US
dc.subjectSAFE LITHIUM BATTERIESen_US
dc.subjectLI-ION BATTERIESen_US
dc.subjectELECTROCHEMICAL PROPERTIESen_US
dc.subjectPERFORMANCEen_US
dc.subjectCHALLENGESen_US
dc.subjectSTORAGEen_US
dc.subjectCELLSen_US
dc.subjectMNen_US
dc.titleHigh-Energy Layered Oxide Cathodes with Thin Shells for Improved Surface Stabilityen_US
dc.typeArticleen_US
dc.relation.volume26-
dc.identifier.doi10.1021/cm502774u-
dc.relation.page5973-5979-
dc.relation.journalCHEMISTRY OF MATERIALS-
dc.contributor.googleauthorNoh, Hyung-Joo-
dc.contributor.googleauthorMyung, Seung-Taek-
dc.contributor.googleauthorLee, Yun Jung-
dc.contributor.googleauthorSun, Yang-Kook-
dc.relation.code2014027123-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyjlee94-
dc.identifier.orcidhttp://orcid.org/0000-0001-6888-5376-
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COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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