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Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors
Low-cost resorcinol formaldehyde (RF) organic aerogels were prepared by using resorcinol and formaldehyde as precursors, and sodium hydroxide as a catalyst through a single-mode microwave radiation-assisted sol-gel method and ambient temperature drying. Because of the ring focusing and power-max tec...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473755/ https://www.ncbi.nlm.nih.gov/pubmed/30960413 http://dx.doi.org/10.3390/polym11030429 |
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author | Cai, Xueqing Tan, Guiming Deng, Zhentao Liu, Jianhong Gui, Dayong |
author_facet | Cai, Xueqing Tan, Guiming Deng, Zhentao Liu, Jianhong Gui, Dayong |
author_sort | Cai, Xueqing |
collection | PubMed |
description | Low-cost resorcinol formaldehyde (RF) organic aerogels were prepared by using resorcinol and formaldehyde as precursors, and sodium hydroxide as a catalyst through a single-mode microwave radiation-assisted sol-gel method and ambient temperature drying. Because of the ring focusing and power-max technology, the fabrication procedure of carbon aerogels (CAs) are much easier, faster, and cheaper than traditional methods. The RF aerogels were then pyrolysized at 900 °C, and the KOH activation process was used to further dredge micropores in the carbon aerogels. The CAs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption/desorption, and a series of electrochemical tests. The KOH activated carbon aerogels with 3D-nano-network structure exhibited a high specific surface area of 2230 m(2) g(−1) with appropriate pore volumes of micro-, meso-, and macropores. The specific capacitance of CAs activated by KOH measured in a two-electrode cell was 170 F g(−1) at 0.5 A g(−1) with excellent rate capability and cycle stability in 6 M KOH electrolyte. |
format | Online Article Text |
id | pubmed-6473755 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64737552019-05-03 Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors Cai, Xueqing Tan, Guiming Deng, Zhentao Liu, Jianhong Gui, Dayong Polymers (Basel) Article Low-cost resorcinol formaldehyde (RF) organic aerogels were prepared by using resorcinol and formaldehyde as precursors, and sodium hydroxide as a catalyst through a single-mode microwave radiation-assisted sol-gel method and ambient temperature drying. Because of the ring focusing and power-max technology, the fabrication procedure of carbon aerogels (CAs) are much easier, faster, and cheaper than traditional methods. The RF aerogels were then pyrolysized at 900 °C, and the KOH activation process was used to further dredge micropores in the carbon aerogels. The CAs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption/desorption, and a series of electrochemical tests. The KOH activated carbon aerogels with 3D-nano-network structure exhibited a high specific surface area of 2230 m(2) g(−1) with appropriate pore volumes of micro-, meso-, and macropores. The specific capacitance of CAs activated by KOH measured in a two-electrode cell was 170 F g(−1) at 0.5 A g(−1) with excellent rate capability and cycle stability in 6 M KOH electrolyte. MDPI 2019-03-06 /pmc/articles/PMC6473755/ /pubmed/30960413 http://dx.doi.org/10.3390/polym11030429 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Cai, Xueqing Tan, Guiming Deng, Zhentao Liu, Jianhong Gui, Dayong Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors |
title | Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors |
title_full | Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors |
title_fullStr | Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors |
title_full_unstemmed | Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors |
title_short | Preparation of Hierarchical Porous Carbon Aerogels by Microwave Assisted Sol-Gel Process for Supercapacitors |
title_sort | preparation of hierarchical porous carbon aerogels by microwave assisted sol-gel process for supercapacitors |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473755/ https://www.ncbi.nlm.nih.gov/pubmed/30960413 http://dx.doi.org/10.3390/polym11030429 |
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