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dc.contributor.author선양국-
dc.date.accessioned2018-03-16T02:29:23Z-
dc.date.available2018-03-16T02:29:23Z-
dc.date.issued2014-01-
dc.identifier.citationJournal of Physical Chemistry C, 2014, 118(1), P.175-182en_US
dc.identifier.issn1932-7447-
dc.identifier.issn1932-7455-
dc.identifier.urihttp://pubs.acs.org/doi/10.1021/jp4097887-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/47687-
dc.description.abstractLi[NixCoyMn1?x?y]O2 cathode materials were synthesized with varying concentration gradients of Ni and Co ions from the particle center (0.62?0.74 mol % for Ni and 0.05 mol % for Co) to the surface (0.48?0.62 mol % for Ni and 0.18 mol % for Co), i.e., full concentration gradient (FCG) with fixed Mn concentrations. In particular, the Mn concentration (20, 25, and 33 mol %) was controlled to optimize electrode performance. The average chemical compositions of lithiated products were Li[NixCo0.16Mn0.84?x]O2 (x = 0.64, 0.59, 0.51). These cathode materials with concentration gradients followed the general performance trend of conventional layered materials; an increase in Ni content improved the capacity, whereas a higher amount of Mn delivered better capacity retention and thermal properties at the expense of capacity. As a result, we determined an optimal level of Mn concentration among the tested FCG cathodes, which maximized the discharge capacity of 188 mAh g?1 and had an excellent capacity retention of 96% over 100 cycles operated up to 4.3 V at 25 °C, with a composition of FCG Li[Ni0.59Co0.16Mn0.25]O2.en_US
dc.description.sponsorshipThis work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MEST) (No. 2009-009278) and by the Global Frontier R&D Program (2013-073298) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT & Future Planning.en_US
dc.language.isoenen_US
dc.publisherAMERICAN CHEMICAL SOCIETYen_US
dc.subjectELECTROCHEMICAL PROPERTIESen_US
dc.subjectHIGH-ENERGYen_US
dc.subjectELECTRODE MATERIALSen_US
dc.subjectMN CONTENTen_US
dc.subjectCOPRECIPITATIONen_US
dc.subjectCHALLENGESen_US
dc.titleOptimization of Layered Cathode Material with Full Concentration Gradient for Lithium-Ion Batteriesen_US
dc.typeArticleen_US
dc.relation.no1-
dc.relation.volume118-
dc.identifier.doi10.1021/jp4097887-
dc.relation.page175-182-
dc.relation.journalJOURNAL OF PHYSICAL CHEMISTRY C-
dc.contributor.googleauthorJu, Jin-Wook-
dc.contributor.googleauthorLee, Eung-Ju-
dc.contributor.googleauthorYoon, Chong S.-
dc.contributor.googleauthorMyung, Seung-Taek-
dc.contributor.googleauthorSun, Yang-Kook-
dc.relation.code2014034235-
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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