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

Xia C., Ren T., Darabi R., Shabani-Nooshabadi M., Jaromír Klemeš J., KARAMAN C., ...Daha Fazla

Energy, cilt.270, 2023 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 270
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.energy.2023.126914
  • Dergi Adı: Energy
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Communication Abstracts, Computer & Applied Sciences, Environment Index, INSPEC, Metadex, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: Asymmetric supercapacitor, CoFe2O4/Graphene nanoribbon, Electrochemical activity, Energy storage systems, High-energy density, Hybrid electrodes
  • Akdeniz Üniversitesi Adresli: Evet

Özet

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.