Fe-doped densely stacked graphene for compact capacitive energy storage

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dc.authorid0000-0001-5807-633X
dc.authorid0000-0002-6340-3064
dc.contributor.authorSinan-Tatli, Neriman
dc.contributor.authorUnur-Yilmaz, Ece
dc.date.accessioned2026-02-12T21:05:00Z
dc.date.available2026-02-12T21:05:00Z
dc.date.issued2023
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractHerein, we present iron oxide (& alpha;-Fe2O3) etching and simultaneous hydrothermal reduction approach to prepare densely stacked defect-rich graphene with abundant pseudocapacitive heteroatoms (18.1 wt% O and 1.2 wt% Fe). Electrochemical measurements were conducted in acidic (1 M H2SO4) and neutral (1 M Na2SO4) aqueous media. The Fe-doped densely stacked graphene (Fe-rGO) with a low specific surface area (32.9 m2 g-1) and high particle density (1.84 g cm-3) displayed high gravimetric and volumetric capacitances of 425 F g-1 and 780 F cm-3 at 0.25 A g-1, respectively, as well as outstanding rate performance (71 % capacitance retention at 20 A g-1 in 1 M H2SO4). Moreover, Fe-rGO exhibited high electrochemical and structural stability over 5000 cycles at 10 A g-1 without any loss in capacitance. An asymmetric supercapacitor (ASC) with Fe-rGO negative electrode and MnO2/PEDOT:PSS positive electrode was assembled with aqueous 1 M Na2SO4 electrolyte. The device exhibited 17.3 Wh kg-1 specific energy and a long cyclic stability (10,000 cycles at 1 A g-1). A practical application of the device was demonstrated by powering a light emitting diode.
dc.description.sponsorshipResearch Fund of the Bursa Technical University [200D004]
dc.description.sponsorshipThis work was financially supported by Research Fund of the Bursa Technical University (Project Number: 200D004) .
dc.identifier.doi10.1016/j.diamond.2023.110247
dc.identifier.issn0925-9635
dc.identifier.issn1879-0062
dc.identifier.scopus2-s2.0-85166280661
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.diamond.2023.110247
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6755
dc.identifier.volume138
dc.identifier.wosWOS:001051708300001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Sa
dc.relation.ispartofDiamond and Related Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260212
dc.subjectFe-doped graphene
dc.subjectHydrothermal reaction
dc.subjectSupercapacitors
dc.titleFe-doped densely stacked graphene for compact capacitive energy storage
dc.typeArticle

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