Spotlighting the boosted energy storage capacity of CoFe2O4/Graphene nanoribbons: A promising positive electrode material for high-energy-density asymmetric supercapacitor

Changlei Xia, Tiyao Ren, Rozhin Darabi, Mehdi Shabani-Nooshabadi, Jiří Jaromír Klemeš, Ceren Karaman, Fatemeh Karimi, Yingji Wu, Hesam Kamyab, Yasser Vasseghian and Shreeshivadasan Chelliapan

Energy, 2023, vol. 270, issue C

Abstract: CoFe2O4/Graphene Nanoribbons (GNRs) nanocomposite was successfully fabricated and utilised as an electrode active material for high-energy supercapacitor cells. Thanks to the outstanding physicochemical features of a graphene nanoribbon with excellent electrical conductivity and the synergistic effect with cobalt ferrite, as well as the pseudocapacitive effect. The CoFe2O4/GNRs nanohybrid offered an exceptional specific capacitance of 922 F g−1 (415 C g−1) at 1.0 A g−1 in 3.0 M KOH electrolyte in a standard 3-electrode set-up. Additionally, the impressive supercapacitive performance metrics showed that the suggested electrode had a distinctive morphology and could be a candidate for capacitive energy storage systems. These metrics included good cycle stability and 87% capacitance retention at the end of the 10,000th CV cycle. Moreover, the asymmetric supercapacitor cell (ASC) was designed by assembling CoFe2O4/GNRs and activated carbon (AC). The resultant ASC provided an improved specific capacitance of 487.85 F g−1 (683 C g−1) at 1.0 A g−1. At this current density value, the energy density and the power density values were computed as to be 132.8 Wh.kg−1 and 632.39 W kg−1. The highest power density was discovered to be 6730.76 W kg−1 at 10.0 A g−1, whereas the energy density was determined as 8.75 Wh.kg−1 at this current density. The results of the work proved that CoFe2O4/GNRs nanohybrids are up-and-coming electrode active materials for advanced electrochemical energy storage and conversion technologies.

Keywords: CoFe2O4/Graphene nanoribbon; Electrochemical activity; High-energy density; Asymmetric supercapacitor; Energy storage systems; Hybrid electrodes (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:270:y:2023:i:c:s0360544223003080

DOI: 10.1016/j.energy.2023.126914

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