Structural and electrochemical evaluation of ball-milled natural specularite ore for supercapacitor applications

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dc.contributor.authorKorkmaz, Aydan Aksogan
dc.contributor.authorKaya, Harun
dc.contributor.authorGuler, Seher
dc.contributor.authorAtalay, Funda Ersoy
dc.date.accessioned2026-06-19T06:39:47Z
dc.date.available2026-06-19T06:39:47Z
dc.date.issued2026
dc.departmentMalatya Turgut Özal Üniversitesi
dc.description.abstractThe widespread availability, high theoretical specific capacitance, and low cost of transition metal oxides, such as iron, make them promising candidates for electrode materials in energy storage applications. Among these nanostructured iron oxides, hematite is a highly preferred material for supercapacitor anodes due to its low cost, non-toxicity, high abundance, and the availability of various oxidation states. This study investigates the unique characteristics of natural (raw) specularite ore, also known as mica hematite, as a supercapacitor electrode material. We employed manual grinding and ball milling methods to reduce the particle size of specularite ore. The sample's morphological, chemical, and structural characteristics were analyzed using XRF, DTA/TGA, XRD, BET, and SEM/EDX, revealing its distinct properties that set it apart from other materials. The electrochemical properties of the specularite ore, ground to the nanoscale using a ball mill, were rigorously evaluated through cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques. The results showed that the specularite electrode exhibited pseudo-capacitive characteristics, with a specific capacitance of 80.6 F g-1 and a stable initial capacitance of 50 F g-1 after 1000 cycles. These findings have significant implications for the practical use of specularite in energy storage applications.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [123M863]; Inonu University Scientific Research Projects Coordination Unit [FDP-2025-3970]
dc.description.sponsorshipThe authors gratefully acknowledge the Scientific and Technological Research Council of Turkey (TUBITAK, Grant 123M863) and Inonu University Scientific Research Projects Coordination Unit (Grant FDP-2025-3970) for their financial support of this research.
dc.identifier.doi10.1016/j.matchemphys.2025.131721
dc.identifier.issn0254-0584
dc.identifier.issn1879-3312
dc.identifier.orcid0000-0002-3309-9719
dc.identifier.scopus2-s2.0-105020935837
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.matchemphys.2025.131721
dc.identifier.urihttps://hdl.handle.net/20.500.12899/5795
dc.identifier.volume348
dc.identifier.wosWOS:001607216800004
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Sa
dc.relation.ispartofMaterials Chemistry and Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20260612
dc.subjectSpecularite
dc.subjectSupercapacitor
dc.subjectBall Milling
dc.subjectEnergy
dc.subjectIron Ore
dc.titleStructural and electrochemical evaluation of ball-milled natural specularite ore for supercapacitor applications
dc.typeArticle

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