An investigation of the improvement in energy storage performance of Na2/3Mn1/2Fe1/2O2by systematic Al-substitution

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dc.authoridALTIN, Serdar/0000-0002-4590-907X
dc.authoridALTUNDAĞ, Sebahat/0000-0002-4777-8376
dc.authoridAltin, Emine/0000-0002-2187-4036
dc.authorwosidbayri, ali/AAA-5966-2021
dc.authorwosidALTIN, EMINE/AHE-9774-2022
dc.authorwosidALTIN, Serdar/H-4880-2014
dc.authorwosidALTUNDAĞ, Sebahat/AAB-4167-2021
dc.contributor.authorAltin, S.
dc.contributor.authorAltundag, S.
dc.contributor.authorAltin, E.
dc.contributor.authorHarfouche, M.
dc.contributor.authorBayri, A.
dc.date.accessioned2024-08-04T20:48:45Z
dc.date.available2024-08-04T20:48:45Z
dc.date.issued2020
dc.departmentİnönü Üniversitesien_US
dc.description.abstractWe successfully fabricated Na2/3Mn1/2Fe1/2-xAlxO2, wherex = 0, 0.01, horizontal ellipsis 0.10, by a modified solid-state reaction technique. The structural properties of the Al-substituted samples were investigated by x-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy and x-ray absorption fine structure (XAFS) measurements. It was found that there were no impurity phases in the XRD patterns of the samples and they fit the P63/mmc symmetry. The Al substitution in Na(2/3)Mn(1/2)Fe(1/2)O(2)causes a decrease in the a-lattice parameter, but the c-parameter starts to increase after a certain substitution value of Al. We suggest that a certain proportion of Al in the samples triggers the change of the spin configuration of the Fe ions, and it may cause an increase in the lattice parameters. The size of the grains was found to be less than 0.9 mu m, from SEM images for all samples. The valence states of the substituted samples as well as the local structure around Fe and Mn were investigated by means of XAFS measurements. The highest capacity for the first cycle was obtained as 134.3 mAh/g forx = 0.07, and the best capacity fade was found to be 0.23 forx = 0.08 substitution. So, the highest performance of the Al-substituted cells was found when 0.08 >= x >= 0.06. The environmental temperature effects on the battery cells were determined at 10 oC, room temperature and 50 oC, and it was found that the temperature plays a crucial role in the Na-ion batteries.en_US
dc.description.sponsorshipTUBITAK [119M169]; SESAME [20185036]en_US
dc.description.sponsorshipAuthors would like to thank TUBITAK for financial support by the contract number of 119M169. Prof. S. Altin would like to thank SESAME for XAFS experiments for granting beamtime to the proposal with project number of 20185036. We also want to thank EU CALIPSO programme for travelling and accommodation support during the SESAME experiments.en_US
dc.identifier.doi10.1007/s10854-020-04042-x
dc.identifier.endpage14794en_US
dc.identifier.issn0957-4522
dc.identifier.issn1573-482X
dc.identifier.issue17en_US
dc.identifier.scopus2-s2.0-85088643418en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage14784en_US
dc.identifier.urihttps://doi.org/10.1007/s10854-020-04042-x
dc.identifier.urihttps://hdl.handle.net/11616/99430
dc.identifier.volume31en_US
dc.identifier.wosWOS:000552946500004en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofJournal of Materials Science-Materials in Electronicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCathode Materialen_US
dc.subjectIonen_US
dc.subjectP2-Typeen_US
dc.subjectAnodeen_US
dc.subjectNa0.67fe0.5mn0.5o2en_US
dc.subjectNa2/3fe1/2mn1/2o2en_US
dc.subjectElectrolyteen_US
dc.subjectManganeseen_US
dc.subjectPhasesen_US
dc.subjectImagejen_US
dc.titleAn investigation of the improvement in energy storage performance of Na2/3Mn1/2Fe1/2O2by systematic Al-substitutionen_US
dc.typeArticleen_US

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