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dc.contributor.author선양국-
dc.date.accessioned2019-03-15T06:37:40Z-
dc.date.available2019-03-15T06:37:40Z-
dc.date.issued2016-11-
dc.identifier.citationADVANCED ENERGY MATERIALS, v. 6, NO. 22, 1601417en_US
dc.identifier.issn1614-6832-
dc.identifier.issn1614-6840-
dc.identifier.urihttps://onlinelibrary.wiley.com/doi/full/10.1002/aenm.201601417-
dc.identifier.urihttp://repository.hanyang.ac.kr/handle/20.500.11754/100851-
dc.description.abstractAl is introduced into a compositionally graded cathode with average composition of Li[Ni0.61Co0.12Mn0.27]O-2 (FCG61) whose Ni and Mn concentrations are designed to vary continuously within the cathode particle. The Al-substituted full concentration gradient (Al-FCG61) cathode is tested for 3000 cycles in a full-cell, mainly to gauge its viability for daily charge/discharge cycles during the service life of electric vehicles (approximate to 10 years). The Al-substitution enables the Al-FCG61 cathode to maintain 84% of its initial capacity even after 3000 cycles. It is demonstrated that the Al-substitution strengthens the grain boundaries, substantiated by the mechanical strength data, thereby delaying the nucleation of microcracks at the phase boundaries which is shown to be the main reason for the cathode failure during long-term cycling. It also shows that the Al-substitution decreases the cation mixing and suppresses the deleterious formation of the secondary phase that likely initiates the microcracks. Unlike an NCA cathode, whose depth of discharge (DOD) must be limited to 60% for long-term cycling, the proposed Al-FCG61 cathode is cycled at 100% DOD for 3000 cycles to fully utilize its available capacity for maximum energy density and subsequent reduction in cost of the battery.en_US
dc.description.sponsorshipThis work was mainly supported by the Global Frontier R&D Program (2013M3A6B1078875) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, Information & Communication Technology (ICT) and the Human Resources Development program (No. 20154010200840) 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.publisherWILEY-V C H VERLAG GMBHen_US
dc.subjectAl-substitutionen_US
dc.subjectfull concentration gradienten_US
dc.subjectlayered NCM cathodeen_US
dc.subjectlithium-ion batteriesen_US
dc.subjectlong-term cyclingen_US
dc.titleCompositionally Graded Cathode Material with Long-Term Cycling Stability for Electric Vehicles Applicationen_US
dc.typeArticleen_US
dc.relation.no22-
dc.relation.volume6-
dc.identifier.doi10.1002/aenm.201601417-
dc.relation.page1-8-
dc.relation.journalADVANCED ENERGY MATERIALS-
dc.contributor.googleauthorKim, Un-Hyuck-
dc.contributor.googleauthorLee, Eung-Ju-
dc.contributor.googleauthorYoon, Chong S.-
dc.contributor.googleauthorMyung, Seung-Taek-
dc.contributor.googleauthorSun, Yang-kook-
dc.relation.code2016010475-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyksun-
dc.identifier.researcherIDB-9157-2013-
dc.identifier.orcidhttp://orcid.org/0000-0002-0117-0170-
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COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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