Croatica Chemica Acta, Vol. 91 No. 4, 2018.
Original scientific paper
https://doi.org/10.5562/cca3452
Reduced Graphene Oxide/α-Fe2O3 Fibres as Active Material for Supercapacitor Application
Gabrijela Radić
; University of Zagreb, Faculty of Chemical Engineering and Technology, Department of Electrochemistry, Marulićev trg 19, HR-10000 Zagreb, Croatia
Ivan Šajnović
; University of Zagreb, Faculty of Chemical Engineering and Technology, Department of Electrochemistry, Marulićev trg 19, HR-10000 Zagreb, Croatia
Željka Petrović
orcid.org/0000-0001-7609-7863
; Ruđer Bošković Institute, Division of Materials Chemistry, Bijenička cesta 54, P.O. Box 180, HR-10002, Zagreb, Croatia
Marijana Kraljić Roković
; University of Zagreb, Faculty of Chemical Engineering and Technology, Department of Electrochemistry, Marulićev trg 19, HR-10000 Zagreb, Croatia
Abstract
The composite hydrogel, composed of reduced graphene oxide and α-Fe2O3 fibres (rGO/α-Fe2O3), was successfully prepared by the hydrothermal procedure starting from GO and α-Fe2O3 nanofibres. According to the SEM and XRD results, α-Fe2O3 fibres are distributed between rGO sheets increasing the inter-sheet space. The rGO/α-Fe2O3 composite was tested as an active material in supercapacitor by means of cyclic voltammetry, galvanostatic charging/discharging and electrochemical impedance spectroscopy in 0.5 mol dm–3 Na2SO4. The obtained results confirmed a positive effect of the α-Fe2O3 addition on capacitive properties. Improved capacitive properties of the composite make this material suitable for supercapacitor application.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Keywords
composite; hematite fibres; hydrothermal method; reduced graphene oxide; supercapacitor
Hrčak ID:
217644
URI
Publication date:
30.12.2018.
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