Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3

Z. Zapata-Benabithe; E. Arenas; D. A. Borrás-Jiménez; S. N. Herrera-Penagos

doi:10.1149/10001.0027ecst

Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3

Z. Zapata-Benabithe, E. Arenas, D. A. Borrás-Jiménez, S. N. Herrera-Penagos

Energy and Thermodynamics

Research output: Chapter in Book/Report/Conference proceeding › Conference and proceedings › peer-review

Abstract

Activated carbon electrodes were synthetized from African palm shell with KOH (CK) at 2/1 KOH/biomass mass ratio and treated thermically at 700 °C (1056 m²/g). Then CK was modified at different conditions by surface treatment using HNO3/CK impregnation mass ratios 1 and 12, temperatures between 25 – 80 °C, impregnation time 1 – 4 h. The performance of electrodes as supercapacitors was evaluated in 1 M H2SO4 using electrical impedance spectroscopy (EIS) and charge/discharge technique (CP). The results showed that the specific capacitance increases upon oxidation (57 F/g up to 89.7 F/g). The highest capacitance was obtained for sample prepared at impregnation ratio 1, 4 h and 25 °C (606 m²/g) without increasing the equivalent resistance series significantly. These results were influenced mainly by the increased of nitrogen functional groups rather than specific surface area, which confirm that the surface composition has a high influence on the electrochemical performance.

Original language	English
Title of host publication	IV Congreso Colombiano de Electroquimica, IVCCEQ 2020
Editors	J. Morales, J. Orozco, J. Calderon, R. A. Torres
Publisher	IOP Publishing Ltd
Pages	27-35
Number of pages	9
Edition	1
ISBN (Electronic)	9781607689102
DOIs	https://doi.org/10.1149/10001.0027ecst
State	Published - 2021
Event	4th Congreso Colombiano de Electroquimica, IVCCEQ 2020 - 4th Colombian Congress of Electrochemistry, IVCCEQ 2020 - Virtual, Online, Colombia Duration: 5 Oct 2020 → 7 Oct 2020

Publication series

Name	ECS Transactions
Number	1
Volume	100
ISSN (Print)	1938-6737
ISSN (Electronic)	1938-5862

Conference

Conference	4th Congreso Colombiano de Electroquimica, IVCCEQ 2020 - 4th Colombian Congress of Electrochemistry, IVCCEQ 2020
Country/Territory	Colombia
City	Virtual, Online
Period	5/10/20 → 7/10/20

Bibliographical note

Publisher Copyright:
© The Electrochemical Society.

Types Minciencias

Artículos de investigación con calidad D

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10.1149/10001.0027ecst

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Zapata-Benabithe, Z., Arenas, E., Borrás-Jiménez, D. A., & Herrera-Penagos, S. N. (2021). Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3. In J. Morales, J. Orozco, J. Calderon, & R. A. Torres (Eds.), IV Congreso Colombiano de Electroquimica, IVCCEQ 2020 (1 ed., pp. 27-35). (ECS Transactions; Vol. 100, No. 1). IOP Publishing Ltd. https://doi.org/10.1149/10001.0027ecst

Zapata-Benabithe, Z. ; Arenas, E. ; Borrás-Jiménez, D. A. et al. / Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3. IV Congreso Colombiano de Electroquimica, IVCCEQ 2020. editor / J. Morales ; J. Orozco ; J. Calderon ; R. A. Torres. 1. ed. IOP Publishing Ltd, 2021. pp. 27-35 (ECS Transactions; 1).

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abstract = "Activated carbon electrodes were synthetized from African palm shell with KOH (CK) at 2/1 KOH/biomass mass ratio and treated thermically at 700 °C (1056 m2/g). Then CK was modified at different conditions by surface treatment using HNO3/CK impregnation mass ratios 1 and 12, temperatures between 25 – 80 °C, impregnation time 1 – 4 h. The performance of electrodes as supercapacitors was evaluated in 1 M H2SO4 using electrical impedance spectroscopy (EIS) and charge/discharge technique (CP). The results showed that the specific capacitance increases upon oxidation (57 F/g up to 89.7 F/g). The highest capacitance was obtained for sample prepared at impregnation ratio 1, 4 h and 25 °C (606 m2/g) without increasing the equivalent resistance series significantly. These results were influenced mainly by the increased of nitrogen functional groups rather than specific surface area, which confirm that the surface composition has a high influence on the electrochemical performance.",

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Zapata-Benabithe, Z , Arenas, E, Borrás-Jiménez, DA & Herrera-Penagos, SN 2021, Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3. in J Morales, J Orozco, J Calderon & RA Torres (eds), IV Congreso Colombiano de Electroquimica, IVCCEQ 2020. 1 edn, ECS Transactions, no. 1, vol. 100, IOP Publishing Ltd, pp. 27-35, 4th Congreso Colombiano de Electroquimica, IVCCEQ 2020 - 4th Colombian Congress of Electrochemistry, IVCCEQ 2020, Virtual, Online, Colombia, 5/10/20. https://doi.org/10.1149/10001.0027ecst

Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3. / Zapata-Benabithe, Z.; Arenas, E.; Borrás-Jiménez, D. A. et al.
IV Congreso Colombiano de Electroquimica, IVCCEQ 2020. ed. / J. Morales; J. Orozco; J. Calderon; R. A. Torres. 1. ed. IOP Publishing Ltd, 2021. p. 27-35 (ECS Transactions; Vol. 100, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference and proceedings › peer-review

TY - GEN

T1 - Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3

AU - Zapata-Benabithe, Z.

AU - Arenas, E.

AU - Borrás-Jiménez, D. A.

AU - Herrera-Penagos, S. N.

N1 - Publisher Copyright: © The Electrochemical Society.

PY - 2021

Y1 - 2021

N2 - Activated carbon electrodes were synthetized from African palm shell with KOH (CK) at 2/1 KOH/biomass mass ratio and treated thermically at 700 °C (1056 m2/g). Then CK was modified at different conditions by surface treatment using HNO3/CK impregnation mass ratios 1 and 12, temperatures between 25 – 80 °C, impregnation time 1 – 4 h. The performance of electrodes as supercapacitors was evaluated in 1 M H2SO4 using electrical impedance spectroscopy (EIS) and charge/discharge technique (CP). The results showed that the specific capacitance increases upon oxidation (57 F/g up to 89.7 F/g). The highest capacitance was obtained for sample prepared at impregnation ratio 1, 4 h and 25 °C (606 m2/g) without increasing the equivalent resistance series significantly. These results were influenced mainly by the increased of nitrogen functional groups rather than specific surface area, which confirm that the surface composition has a high influence on the electrochemical performance.

AB - Activated carbon electrodes were synthetized from African palm shell with KOH (CK) at 2/1 KOH/biomass mass ratio and treated thermically at 700 °C (1056 m2/g). Then CK was modified at different conditions by surface treatment using HNO3/CK impregnation mass ratios 1 and 12, temperatures between 25 – 80 °C, impregnation time 1 – 4 h. The performance of electrodes as supercapacitors was evaluated in 1 M H2SO4 using electrical impedance spectroscopy (EIS) and charge/discharge technique (CP). The results showed that the specific capacitance increases upon oxidation (57 F/g up to 89.7 F/g). The highest capacitance was obtained for sample prepared at impregnation ratio 1, 4 h and 25 °C (606 m2/g) without increasing the equivalent resistance series significantly. These results were influenced mainly by the increased of nitrogen functional groups rather than specific surface area, which confirm that the surface composition has a high influence on the electrochemical performance.

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U2 - 10.1149/10001.0027ecst

DO - 10.1149/10001.0027ecst

M3 - Ponencia publicada en las memorias del evento con ISBN

AN - SCOPUS:85101470710

T3 - ECS Transactions

SP - 27

EP - 35

BT - IV Congreso Colombiano de Electroquimica, IVCCEQ 2020

A2 - Morales, J.

A2 - Orozco, J.

A2 - Calderon, J.

A2 - Torres, R. A.

PB - IOP Publishing Ltd

T2 - 4th Congreso Colombiano de Electroquimica, IVCCEQ 2020 - 4th Colombian Congress of Electrochemistry, IVCCEQ 2020

Y2 - 5 October 2020 through 7 October 2020

ER -

Zapata-Benabithe Z , Arenas E, Borrás-Jiménez DA, Herrera-Penagos SN. Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3. In Morales J, Orozco J, Calderon J, Torres RA, editors, IV Congreso Colombiano de Electroquimica, IVCCEQ 2020. 1 ed. IOP Publishing Ltd. 2021. p. 27-35. (ECS Transactions; 1). doi: 10.1149/10001.0027ecst

Improvement of electrochemical capacitance of activated carbon electrodes from African palm shell modified with HNO3

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