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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
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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). |
format | Online Article Text |
id | pubmed-9044192 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
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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