Enhanced Electrochemical Performance of Supercapacitors Using Fe3O4-Doped Biomass-Derived Activated Carbon Electrodes
Makaleler > Tam Makale · 2025
Yazarlar: Kadir Sinan Aslan, Erdal Ertas, Mehmet Firat Baran, Abdulkadir Levent, Seyhmus Tumur, Azız EFTEKHARIMEHRABAD, Ondrej Sausa, Oleh Smutok, Taras Kavetskyy, Evgeny Katz
ELECTROCHEMICAL SCIENCE ADVANCES, ESCI İndekslerine Giren Dergi, Uluslararası, Wos, 2025, cilt 6, ss 4583-e26351
DOI: 10.1002/elsa.70014
Özet
The energy storage performance of supercapacitors-defined by specific capacitance, energy density, and power density-is strongly influenced by the structural and electrochemical properties of electrode materials. While cathode development has advanced significantly, research on efficient and sustainable anode materials remains limited, hindering further improvements in energy density. This study presents a low-cost, sustainable anode material derived from Abelmoschus esculentus (AE) seed biomass. Activated carbon (AE-AC) was prepared via chemical activation and subsequently coated with magnetic Fe3O4 nanoparticles synthesised through co-precipitation to form an AE-AC-doped Fe3O4 nanocomposite. The materials were characterised using XRD, SEM-EDX, BET surface area analysis, and other techniques. Electrochemical performance was evaluated using cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS). At a scan rate of 2.5 mV/s, both electrodes exhibited peak capacitance. GCD analysis showed specific capacitances of 119.97 F/g for AE-AC and 205.86 F/g for AE-AC-doped Fe3O4 at 0.05 A/g. EIS results confirmed enhanced performance of the nanocomposite in acidic medium. These findings highlight the potential of AE-based activated carbon composites as environmentally friendly and efficient anode materials for next-generation supercapacitors.