Speaker
Description
Abstract
Energy is a fundamental factor for socio-economic development, and the increasing global demand, combined with environmental concerns, makes the development of efficient energy storage systems essential [1]. Supercapacitors have emerged as promising devices due to their high power density, fast charge–discharge capability, and long cycle life, complementing batteries in applications from portable electronics to electric vehicles[2].
Conducting polymers such as polypyrrole (PPy) are widely used in supercapacitors for their good conductivity and pseudocapacitive behavior[3]. Transition metal oxides like Fe₂O₃ provide additional redox-active sites, while graphitic carbon nitride (g-C₃N₄) offers a porous structure that improves structural stability in composite electrodes[4].
In this work, two PPy-based electrodes supported on nickel foam were fabricated and compared. The first electrode was prepared by electropolymerization of PPy. The second electrode was preperd using a layer-by-layer approach in which PPy was combined with Fe₂O₃/g-C₃N₄ to form a composite architecture. Electrochemical characterization showed an areal capacitance of 0.228 F•cm⁻² for the PPy electrode, while the composite electrode reached 0.268 F•cm⁻² (~17.5% increase). the enhancement, although modestdemonstrates that incorporating Fe₂O₃ and g-C₃N₄ improves redox activity and structural stability, highlighting the potential of hybrid electrodes for next-generation supercapacitor applications.
REFERENCES
[1] Md Mustafizur Rahman, Abayomi Olufemi Oni, Eskinder Gemechu, and Amit Kumar, “Assessment of energy storage technologies: A review,” vol. 223, 2020, doi: 113295.
[2] Chavhan, M. P., Khandelwal, M., Arya, S., Das, T., Singh, A., & Ghodbane, O. (2024). A review of nanocomposites/hybrids made from biomass-derived carbons for electrochemical capacitors. Chemical Engineering Journal, 500, 157267.
[3] Yang Huang et al., “Nanostructured Polypyrrole as a flexible electrode material of supercapacitor,” Nano Energy, 2016, doi: http://dx.doi.org/10.1016/j.nanoen.2016.02.047i.
[4] Nahdi, A., Kouass, S., Touati, F., Dhaouadi, H., & Othmani, A. (2024). Synthesis of WO3/g-C3N4/Cu hybrid nanocomposite as a new efficient levofloxacin electrochemical sensor. Journal of Applied Electrochemistry, 54(4), 935-950.
