Publication: Kenaf-based activated carbon: A sustainable solution for high-performance aqueous symmetric supercapacitors
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Date
2024
Authors
Subramaniam T.
Ansari M.N.M.
Krishnan S.G.
Khalid M.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Ltd
Abstract
This study presents an innovative method for synthesizing activated carbon with an exceptionally high surface area (3359 m2 g?1) using kenaf fiber-based biochar through chemical activation. The achieved specific surface area surpasses activated carbon derived from other reported fiber-based precursors. The resulting activated carbon was investigated as electrodes for supercapacitors, revealing a remarkable maximum capacitance of 312 F g?1 at a current density of 0.5 A g?1. An aqueous symmetric supercapacitor employing these high-surface-area electrodes exhibited an outstanding energy density of 18.9 Wh kg?1 at a power density of 250 W kg?1. Notably, the supercapacitor retained exceptional capacitance, maintaining 93% of its initial capacitance even after 5000 charge-discharge cycles. ? 2024 Elsevier Ltd
Description
Keywords
Charcoal , Electric Capacitance , Electrodes , Hibiscus , Activation energy , Capacitance , Electric discharges , Electrodes , Hemp , Kenaf fibers , Supercapacitor , activated carbon , charcoal , charcoal , Biochar , Carbon A , Energy density , High surface area , High surface area electrodes , Innovative method , Performance , Sustainable solution , Symmetric supercapacitor , Symmetrics , activated carbon , biochar , chemical analysis , electrode , energy efficiency , performance assessment , sustainability , Article , controlled study , current density , density , kenaf , surface area , electric capacitance , Hibiscus , Activated carbon