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Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes

In recent years, porous carbon materials with high specific surface area and porosity have been developed to meet the commercial demands of supercapacitor applications. Carbon aerogels (CAs) with three-dimensional porous networks are promising materials for electrochemical energy storage application...

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Autores principales: Lee, Jong-Hoon, Lee, Seul-Yi, Park, Soo-Jin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10005637/
https://www.ncbi.nlm.nih.gov/pubmed/36903696
http://dx.doi.org/10.3390/nano13050817
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author Lee, Jong-Hoon
Lee, Seul-Yi
Park, Soo-Jin
author_facet Lee, Jong-Hoon
Lee, Seul-Yi
Park, Soo-Jin
author_sort Lee, Jong-Hoon
collection PubMed
description In recent years, porous carbon materials with high specific surface area and porosity have been developed to meet the commercial demands of supercapacitor applications. Carbon aerogels (CAs) with three-dimensional porous networks are promising materials for electrochemical energy storage applications. Physical activation using gaseous reagents provides controllable and eco-friendly processes due to homogeneous gas phase reaction and removal of unnecessary residue, whereas chemical activation produced wastes. In this work, we have prepared porous CAs activated by gaseous carbon dioxide, with efficient collisions between the carbon surface and the activating agent. Prepared CAs display botryoidal shapes resulting from aggregation of spherical carbon particles, whereas activated CAs (ACAs) display hollow space and irregular particles from activation reactions. ACAs have high specific surface areas (2503 m(2) g(−1)) and large total pore volumes (1.604 cm(3) g(−1)), which are key factors for achieving a high electrical double-layer capacitance. The present ACAs achieved a specific gravimetric capacitance of up to 89.1 F g(−1) at a current density of 1 A g(−1), along with a high capacitance retention of 93.2% after 3000 cycles.
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spelling pubmed-100056372023-03-11 Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes Lee, Jong-Hoon Lee, Seul-Yi Park, Soo-Jin Nanomaterials (Basel) Article In recent years, porous carbon materials with high specific surface area and porosity have been developed to meet the commercial demands of supercapacitor applications. Carbon aerogels (CAs) with three-dimensional porous networks are promising materials for electrochemical energy storage applications. Physical activation using gaseous reagents provides controllable and eco-friendly processes due to homogeneous gas phase reaction and removal of unnecessary residue, whereas chemical activation produced wastes. In this work, we have prepared porous CAs activated by gaseous carbon dioxide, with efficient collisions between the carbon surface and the activating agent. Prepared CAs display botryoidal shapes resulting from aggregation of spherical carbon particles, whereas activated CAs (ACAs) display hollow space and irregular particles from activation reactions. ACAs have high specific surface areas (2503 m(2) g(−1)) and large total pore volumes (1.604 cm(3) g(−1)), which are key factors for achieving a high electrical double-layer capacitance. The present ACAs achieved a specific gravimetric capacitance of up to 89.1 F g(−1) at a current density of 1 A g(−1), along with a high capacitance retention of 93.2% after 3000 cycles. MDPI 2023-02-23 /pmc/articles/PMC10005637/ /pubmed/36903696 http://dx.doi.org/10.3390/nano13050817 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lee, Jong-Hoon
Lee, Seul-Yi
Park, Soo-Jin
Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes
title Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes
title_full Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes
title_fullStr Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes
title_full_unstemmed Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes
title_short Highly Porous Carbon Aerogels for High-Performance Supercapacitor Electrodes
title_sort highly porous carbon aerogels for high-performance supercapacitor electrodes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10005637/
https://www.ncbi.nlm.nih.gov/pubmed/36903696
http://dx.doi.org/10.3390/nano13050817
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