Temperature Dependency of Sodium Ionic Activity in β-NaFeO2 Material

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dc.authoridSaran, Sevda/0000-0002-2647-0700
dc.authoridOzkendir, Osman Murat/0000-0002-0810-9938
dc.contributor.authorOzkendir, O. Murat
dc.contributor.authorSaran, Sevda
dc.date.accessioned2025-03-17T12:27:34Z
dc.date.available2025-03-17T12:27:34Z
dc.date.issued2023
dc.departmentTarsus Üniversitesi
dc.description.abstractAn investigation of temperature-dependent ionic activity of a representative sodium oxide material was carried out in the current research work due to the known importance of heat challenges in the battery development process. To assess the heat effects on the ionic conductivity capabilities, the electrochemical, electronic, and crystal structure properties of beta-NaFeO2 and beta-NaFeO2:Bi2Te3 composite materials were examined. The ionic conductivity of samples was slightly decreased by increasing the temperature, especially above 50-70 degrees C. In contrast, better results were achieved for the beta-NaFeO2:Bi2Te3 composite material than the parent beta-NaFeO2 material as an indicator of the impacts of thermoelectric properties. At comparable temperatures, x-ray absorption (XAS) and x-ray absorption fine structure (XAFS) spectroscopic data were collected and processed to demonstrate the physical background influence of the increase in temperature on the atoms of the materials. It was found that the sodium atoms were the greatest contributors to the ionic conductivity loss at an increasing temperature among the materials. By separating from the spinel structure Fe-O ligand, sodium atoms increased the ionic capacitance by raising the temperature with a worse ionic conductivity. However, studies on the beta-NaFeO2:Bi2Te3 composite material revealed a better ionic conductivity change than the beta-NaFeO2 material with increasing temperature. This achievement was very clearly highlighted, particularly at the best working temperatures of Bi2Te3 material with a mechanism of absorbing waste heat and emitting free electrons. Additionally, the inactivity of beta-NaFeO2 material could be determined by the instability of Na sites, which worsens with the increase in heat.
dc.description.sponsorshipSwedish Research Council [2018-04969]; Swedish Governmental Agency for Innovation Systems [2019-02496]; Formas [MF.21.008]; Tarsus University (Turkiye); HESEB project from the Initiative and Networking Fund of the Helmholtz Association; [2018-07152]; Formas [2019-02496] Funding Source: Formas
dc.description.sponsorshipWe acknowledge the MAX IV Laboratory for time on the Balder beamline under Proposal 20220767. Research conducted at MAX IV, a Swedish national user facility, is supported by the Swedish Research Council under contract 2018-07152, the Swedish Governmental Agency for Innovation Systems under contract 2018-04969, and Formas under contract 2019-02496. The authors also would like to thank beamline scientist Dr. Alexei Preobrajenski and research engineer Dr. Alexander Generalov at the FlexPES beamline, and Dr. Konstantin Klementiev at the Balder beamline of the MAX IV synchrotron for their support and warm interest during data analyses. This study is supported by the MF.21.008 project of Tarsus University (Turkiye) and also by a grant from the research stay program, an activity of the HESEB project funded from the Initiative and Networking Fund of the Helmholtz Association.
dc.identifier.doi10.1007/s11664-023-10434-6
dc.identifier.endpage4707
dc.identifier.issn0361-5235
dc.identifier.issn1543-186X
dc.identifier.issue7
dc.identifier.scopus2-s2.0-85153332884
dc.identifier.scopusqualityQ2
dc.identifier.startpage4699
dc.identifier.urihttps://doi.org/10.1007/s11664-023-10434-6
dc.identifier.urihttps://hdl.handle.net/20.500.13099/2307
dc.identifier.volume52
dc.identifier.wosWOS:000974814500001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofJournal of Electronic Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250316
dc.subjectThermoelectric material
dc.subjectNa-ion batteries
dc.subjectelectronic structure
dc.subjectcrystal structure
dc.subjectXAS
dc.subjectXAFS
dc.titleTemperature Dependency of Sodium Ionic Activity in β-NaFeO2 Material
dc.typeArticle

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