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Synthesis and lithium electrode application of ZnO-ZnFe2O4 nanocomposites and porously assembled ZnFe2O4 nanoparticles

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dc.contributor.authorWoo, M.A.
dc.contributor.authorKim, T.W.
dc.contributor.authorKim, I.Y.
dc.contributor.authorHwang, S.J.
dc.date.issued2011
dc.description.abstractThe mixed metal oxide nanocomposites composed of spinel ZnFe2O4 and wurzite ZnO phases are prepared by the heat-treatment for Zn,Fe-layered double hydroxide (Zn,Fe-LDH) at elevated temperatures. The following selective etching of ZnO domains from the nanocomposites yields porously assembled ZnFe2O4 nanocrystals. The structural transformation from the brucite LDH structure to the spinel and/or wurzite structures was confirmed by X-ray diffraction and X-ray absorption spectroscopy. According to chemical analysis, electron microscopy, and N-2 adsorption-desorption isotherm measurements, not only the chemical composition of the nanocomposites but also the particle size and surface area of the etched ZnFe2O4 nanoparticles can be controlled by changing the Fe/Zn ratio in the precursor metal hydroxide. The calcined nanocomposites show promising functionality as negative electrode materials for lithium ion batteries, which is superior to that of uncomposited ZnFe2O4 or ZnO phase. The degrading of the electrode performance of the nanocomposites after the selective etching of ZnO component clearly demonstrates the positive effect of nanocomposite formation on the electrochemical activity of metal oxides.
dc.identifier.citationSolid State Ionics, 2011; 182(1):91-97
dc.identifier.doi10.1016/j.ssi.2010.10.025
dc.identifier.issn0167-2738
dc.identifier.urihttps://hdl.handle.net/11541.2/123213
dc.language.isoen
dc.publisherElsevier BV
dc.relation.fundingMinistry of Education, Science and Technology 20090093646
dc.relation.fundingDaegu Gyeongbuk Institute of Science and Technology (DGIST)
dc.relation.fundingKorean Government 2010-0001485
dc.rightsCopyright 2010 Elsevier B.V.
dc.source.urihttp://dx.doi.org/10.1016/j.ssi.2010.10.025
dc.subjectlayered double hydroxide
dc.subjectlithium ion electrode
dc.subjectnanocomposites
dc.subjectphase transformation
dc.subjectselective etching
dc.titleSynthesis and lithium electrode application of ZnO-ZnFe2O4 nanocomposites and porously assembled ZnFe2O4 nanoparticles
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9916105291001831

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