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dc.contributor.author선양국-
dc.date.accessioned2017-03-10T07:18:28Z-
dc.date.available2017-03-10T07:18:28Z-
dc.date.issued2015-07-
dc.identifier.citationJOURNAL OF MATERIALS CHEMISTRY A, v. 3, NO 28, Page. 14598-14608en_US
dc.identifier.issn2050-7488-
dc.identifier.issn2050-7496-
dc.identifier.urihttp://pubs.rsc.org/-/content/articlehtml/2015/ta/c5ta02233a-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/26019-
dc.description.abstractA Li-rich layered-spinel material with a target composition Li1.17Ni0.25Mn1.08O3 (xLi[Li1/3Mn2/3]O-2.(1 - x) LiNi0.5Mn1.5O4, (x = 0.5)) was synthesized by a self-combustion reaction (SCR), characterized by XRD, SEM, TEM, Raman spectroscopy and was studied as a cathode material for Li-ion batteries. The Rietveld refinement results indicated the presence of monoclinic (Li[Li1/3Mn2/3]O-2) (52%), spinel (LiNi0.5Mn1.5O4) (39%) and rhombohedral LiNiO2 (9%). The electrochemical performance of this Li-rich integrated cathode material was tested at 30 degrees C and compared to that of high voltage LiNi0.5Mn1.5O4 spinel cathodes. Interestingly, the layered-spinel integrated cathode material exhibits a high specific capacity of about 200 mA h g(-1) at C/10 rate as compared to 180 mA h g(-1) for LiNi0.5Mn1.5O4 in the potential range of 2.4-4.9 V vs. Li anodes in half cells. The layered-spinel integrated cathodes exhibited 92% capacity retention as compared to 82% for LiNi0.5Mn1.5O4 spinel after 80 cycles at 30 degrees C. Also, the integrated cathode material can exhibit 105 mA h g(-1) at 2 C rate as compared to 78 mA h g(-1) for LiNi0.5Mn1.5O4. Thus, the presence of the monoclinic phase in the composite structure helps to stabilize the spinel structure when high specific capacity is required and the electrodes have to work within a wide potential window. Consequently, the Li1.17Ni0.25Mn1.08O3 composite material described herein can be considered as a promising cathode material for Li ion batteries.en_US
dc.description.sponsorshipPartial support for this work was obtained from the Israel Science Foundation (ISF) in the framework of the INREP project and from the Israel Ministry of Science and Technology in the framework of the Israel-India binational collaboration program.en_US
dc.language.isoenen_US
dc.publisherROYAL SOC CHEMISTRYen_US
dc.subjectJAHN-TELLER DISTORTIONen_US
dc.subjectHIGH-VOLTAGEen_US
dc.subjectLITHIUM BATTERIESen_US
dc.subjectRATE PERFORMANCEen_US
dc.subjectCO ELECTRODESen_US
dc.subjectLINI0.5MN1.5O4en_US
dc.subjectNIen_US
dc.subjectLIMN2O4en_US
dc.subjectTRANSFORMATIONen_US
dc.subjectMANGANESEen_US
dc.titleImproved capacity and stability of integrated Li and Mn rich layered-spinel Li1.17Ni0.25Mn1.08O3 cathodes for Li-ion batteriesen_US
dc.typeArticleen_US
dc.relation.no28-
dc.relation.volume3-
dc.identifier.doi10.1039/c5ta02233a-
dc.relation.page14598-14608-
dc.relation.journalJOURNAL OF MATERIALS CHEMISTRY A-
dc.contributor.googleauthorNayak, Prasant Kumar-
dc.contributor.googleauthorGrinblat, Judith-
dc.contributor.googleauthorLevi, Mikhael-
dc.contributor.googleauthorHaik, Ortal-
dc.contributor.googleauthorLevi, Elena-
dc.contributor.googleauthorSun, Yang-Kook-
dc.contributor.googleauthorMunichandraiah, N.-
dc.contributor.googleauthorAurbach, Doron-
dc.relation.code2015000269-
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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