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Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels
This work investigates the impact of carbon black (CB) as a porogenic agent and conductive additive in the preparation of electrically conductive nanoporous carbon gels. For this, a series of materials were prepared by the polycondensation of resorcinol/formaldehyde mixtures in the presence of incre...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6981367/ https://www.ncbi.nlm.nih.gov/pubmed/31947941 http://dx.doi.org/10.3390/ma13010217 |
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author | Casanova, Ana Gomis-Berenguer, Alicia Canizares, Aurelien Simon, Patrick Calzada, Dolores Ania, Conchi O. |
author_facet | Casanova, Ana Gomis-Berenguer, Alicia Canizares, Aurelien Simon, Patrick Calzada, Dolores Ania, Conchi O. |
author_sort | Casanova, Ana |
collection | PubMed |
description | This work investigates the impact of carbon black (CB) as a porogenic agent and conductive additive in the preparation of electrically conductive nanoporous carbon gels. For this, a series of materials were prepared by the polycondensation of resorcinol/formaldehyde mixtures in the presence of increasing amounts of carbon black. The conductivity of the carbon gel/CB composites increased considerably with the amount of CB, indicating a good dispersion of the additive within the carbon matrix. A percolation threshold of ca. 8 wt.% of conductive additive was found to achieve an adequate “point to point” conductive network. This value is higher than that reported for other additives, owing to the synthetic route chosen, as the additive was incorporated in the reactant’s mixture (pre-synthesis) rather than in the formulation of the electrodes ink (post-synthesis). The CB strongly influenced the development of the porous architecture of the gels that exhibited a multimodal mesopore structure comprised of two distinct pore networks. The microporosity and the primary mesopore structure remained rather unchanged. On the contrary, a secondary network of mesopores was formed in the presence of the additive. Furthermore, the average mesopore size and the volume of the secondary network increased with the amount of CB. |
format | Online Article Text |
id | pubmed-6981367 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-69813672020-02-07 Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels Casanova, Ana Gomis-Berenguer, Alicia Canizares, Aurelien Simon, Patrick Calzada, Dolores Ania, Conchi O. Materials (Basel) Article This work investigates the impact of carbon black (CB) as a porogenic agent and conductive additive in the preparation of electrically conductive nanoporous carbon gels. For this, a series of materials were prepared by the polycondensation of resorcinol/formaldehyde mixtures in the presence of increasing amounts of carbon black. The conductivity of the carbon gel/CB composites increased considerably with the amount of CB, indicating a good dispersion of the additive within the carbon matrix. A percolation threshold of ca. 8 wt.% of conductive additive was found to achieve an adequate “point to point” conductive network. This value is higher than that reported for other additives, owing to the synthetic route chosen, as the additive was incorporated in the reactant’s mixture (pre-synthesis) rather than in the formulation of the electrodes ink (post-synthesis). The CB strongly influenced the development of the porous architecture of the gels that exhibited a multimodal mesopore structure comprised of two distinct pore networks. The microporosity and the primary mesopore structure remained rather unchanged. On the contrary, a secondary network of mesopores was formed in the presence of the additive. Furthermore, the average mesopore size and the volume of the secondary network increased with the amount of CB. MDPI 2020-01-04 /pmc/articles/PMC6981367/ /pubmed/31947941 http://dx.doi.org/10.3390/ma13010217 Text en © 2020 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 Casanova, Ana Gomis-Berenguer, Alicia Canizares, Aurelien Simon, Patrick Calzada, Dolores Ania, Conchi O. Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels |
title | Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels |
title_full | Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels |
title_fullStr | Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels |
title_full_unstemmed | Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels |
title_short | Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels |
title_sort | carbon black as conductive additive and structural director of porous carbon gels |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6981367/ https://www.ncbi.nlm.nih.gov/pubmed/31947941 http://dx.doi.org/10.3390/ma13010217 |
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