Sustainable Synthesis of Porous Activated Carbon from Kalakai (Stenochlaena palustris) as Promising Electrode for Supercapacitor Applications
DOI:
https://doi.org/10.20527/bpi.v8i1.276Keywords:
kalakai, nitric acid, activated carbon, electrode, supercapacitorAbstract
Activated carbon derived from Kalakai (Stenochlaena palustris) was synthesized using nitric acid (HNO₃) as an activating agent at varying concentrations (0.5, 1, and 2 M) to investigate the potential of wetland plant-derived materials for supercapacitor electrodes. The synthesis involved a combined thermal and chemical activation process: first, chemical activation was carried out using a reflux system, followed by thermal activation at 600°C for 1 h under a nitrogen (N₂) atmosphere. The influence of HNO₃ concentration on the electrochemical performance of the resulting activated carbon was systematically evaluated. Electrochemical characterization revealed that the sample activated with 2 M HNO₃ (denoted as Ac-HNO₃/2) exhibited the most favorable supercapacitor performance, achieving a specific capacitance of 12.96 F g⁻¹ and an internal resistance (Rₑₜ) of 14.44 Ω. These findings demonstrate that Kalakai-derived activated carbon holds significant promise as an electrode material for energy storage applications. Keywords: kalakai, nitric acid, activated carbon, electrode, supercapacitorReferences
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