Coin-Cell Electric Double-Layer Capacitors with African Palm Kernel Activated Carbon Under Series and Parallel Connection.
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| Title: | Coin-Cell Electric Double-Layer Capacitors with African Palm Kernel Activated Carbon Under Series and Parallel Connection. |
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| Authors: | Gaviria, Chelsy1 (AUTHOR), Zapata-Benabithe, Zulamita1,2 (AUTHOR) zulamita.zapata@upb.edu.co, Restrepo, José Valentín2,3 (AUTHOR), Diez-Restrepo, Andrés Emiro2,4 (AUTHOR), Barrios, Yiranis1,5 (AUTHOR), Úsuga, Mauricio1,4 (AUTHOR), Arenas-Castiblanco, Erika1,2 (AUTHOR), Nieto-Londoño, César1,3,5 (AUTHOR) |
| Source: | Nanomaterials (2079-4991). Feb2026, Vol. 16 Issue 4, p260. 22p. |
| Subjects: | Supercapacitors, Activated carbon, Energy storage, Biomass chemicals, Electrochemical analysis |
| Abstract: | The growing demand for efficient and sustainable energy storage has intensified interest in green materials known for their high-power density. In this work, we evaluated the electrochemical and electrical performance of coin-cell supercapacitors with activated carbon electrodes from palm kernel shell. Two activated carbons were obtained using KOH and ZnCl2 as activating agents at 700 °C and then superficially modified with nitric acid. The KOH-activated carbon electrodes showed the highest specific surface area (1181 m2 g−1) and the best electrochemical behavior, reaching an average gravimetric capacitance of 56. ± 9.2 F g−1. The coins were characterized electrically by series and parallel arrangements, yielding specific energy and specific power densities of 2.6 Wh kg−1 and 475 W kg−1, and 1.8 Wh kg−1 and 353 W kg−1, at 0.001 A and 0.75 V for parallel and series arrangements, respectively. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The growing demand for efficient and sustainable energy storage has intensified interest in green materials known for their high-power density. In this work, we evaluated the electrochemical and electrical performance of coin-cell supercapacitors with activated carbon electrodes from palm kernel shell. Two activated carbons were obtained using KOH and ZnCl2 as activating agents at 700 °C and then superficially modified with nitric acid. The KOH-activated carbon electrodes showed the highest specific surface area (1181 m2 g−1) and the best electrochemical behavior, reaching an average gravimetric capacitance of 56. ± 9.2 F g−1. The coins were characterized electrically by series and parallel arrangements, yielding specific energy and specific power densities of 2.6 Wh kg−1 and 475 W kg−1, and 1.8 Wh kg−1 and 353 W kg−1, at 0.001 A and 0.75 V for parallel and series arrangements, respectively. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20794991 |
| DOI: | 10.3390/nano16040260 |
