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Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications

Activated carbon monoliths of kenaf (ACMKs) were prepared by moulding kenaf fibers into a column-shape monolith and then carrying out pyrolysis at 500, 600, 700 or 800 °C, followed by activation with KOH at 700 °C. Then, the sample was characterized using thermogravimetric analyzer (TGA), field-emis...

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Autores principales: Park, Han Yul, Huang, Minhu, Yoon, Tae-Ho, Song, Kyung Hun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9044192/
https://www.ncbi.nlm.nih.gov/pubmed/35493259
http://dx.doi.org/10.1039/d1ra07815a
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author Park, Han Yul
Huang, Minhu
Yoon, Tae-Ho
Song, Kyung Hun
author_facet Park, Han Yul
Huang, Minhu
Yoon, Tae-Ho
Song, Kyung Hun
author_sort Park, Han Yul
collection PubMed
description Activated carbon monoliths of kenaf (ACMKs) were prepared by moulding kenaf fibers into a column-shape monolith and then carrying out pyrolysis at 500, 600, 700 or 800 °C, followed by activation with KOH at 700 °C. Then, the sample was characterized using thermogravimetric analyzer (TGA), field-emission scanning electron microscopy (FE-SEM), field-emission transmission electron microscopy (FE-TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffraction (XRD) and N(2) sorption instruments. The prepared ACMK was subjected to electrochemical property evaluation via cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS). The GCD study using a three-electrode system showed that the specific capacitance decreased with higher pyrolysis temperature (PYT) with the ACMK pyrolyzed at 500 °C (ACMK-500) exhibiting the highest specific capacitance of 217 F g(−1). A two-electrode system provided 95.9% retention upon a 5000 cycle test as well as the specific capacitance of 212 F g(−1), being converted to an energy density of 6 W h kg(−1) at a power density of 215 W kg(−1).
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spelling pubmed-90441922022-04-28 Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications Park, Han Yul Huang, Minhu Yoon, Tae-Ho Song, Kyung Hun RSC Adv Chemistry Activated carbon monoliths of kenaf (ACMKs) were prepared by moulding kenaf fibers into a column-shape monolith and then carrying out pyrolysis at 500, 600, 700 or 800 °C, followed by activation with KOH at 700 °C. Then, the sample was characterized using thermogravimetric analyzer (TGA), field-emission scanning electron microscopy (FE-SEM), field-emission transmission electron microscopy (FE-TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffraction (XRD) and N(2) sorption instruments. The prepared ACMK was subjected to electrochemical property evaluation via cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS). The GCD study using a three-electrode system showed that the specific capacitance decreased with higher pyrolysis temperature (PYT) with the ACMK pyrolyzed at 500 °C (ACMK-500) exhibiting the highest specific capacitance of 217 F g(−1). A two-electrode system provided 95.9% retention upon a 5000 cycle test as well as the specific capacitance of 212 F g(−1), being converted to an energy density of 6 W h kg(−1) at a power density of 215 W kg(−1). The Royal Society of Chemistry 2021-11-30 /pmc/articles/PMC9044192/ /pubmed/35493259 http://dx.doi.org/10.1039/d1ra07815a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Park, Han Yul
Huang, Minhu
Yoon, Tae-Ho
Song, Kyung Hun
Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications
title Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications
title_full Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications
title_fullStr Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications
title_full_unstemmed Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications
title_short Electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications
title_sort electrochemical properties of kenaf-based activated carbon monolith for supercapacitor electrode applications
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9044192/
https://www.ncbi.nlm.nih.gov/pubmed/35493259
http://dx.doi.org/10.1039/d1ra07815a
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