Application of nanotextured carbons for electrochemical energy storage in aqueous medium
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000600004 |
Resumo: | This paper presents a hybrid capacitor, with two different electrodes working in their optimal potential range. The negative electrode is based on the reversible hydrogen sorption which occurs at low potential values in nanoporous carbons. Galvanostatic cycling at temperatures ranging from 20 to 60 ºC demonstrates that hydrogen is weakly chemisorbed. This is confirmed by TPD on the electrode material after charging, which shows a peak due to hydrogen at 200-250 ºC. The positive electrode is a composite made of carbon nanotubes, as minor component, and MnO2. Interesting properties are given by the presence of nanotubes, such as a developed porosity, a high electrical conductivity and a good resiliency, all being very important for enhancing the power and cycle life of supercapacitors. The hybrid capacitor is able to operate at voltage values as high as 2 V in aqueous medium with a long cycle life. |
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Journal of the Brazilian Chemical Society (Online) |
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Application of nanotextured carbons for electrochemical energy storage in aqueous mediumnanotextured carbonsenergy storagehybrid supercapacitorThis paper presents a hybrid capacitor, with two different electrodes working in their optimal potential range. The negative electrode is based on the reversible hydrogen sorption which occurs at low potential values in nanoporous carbons. Galvanostatic cycling at temperatures ranging from 20 to 60 ºC demonstrates that hydrogen is weakly chemisorbed. This is confirmed by TPD on the electrode material after charging, which shows a peak due to hydrogen at 200-250 ºC. The positive electrode is a composite made of carbon nanotubes, as minor component, and MnO2. Interesting properties are given by the presence of nanotubes, such as a developed porosity, a high electrical conductivity and a good resiliency, all being very important for enhancing the power and cycle life of supercapacitors. The hybrid capacitor is able to operate at voltage values as high as 2 V in aqueous medium with a long cycle life.Sociedade Brasileira de Química2006-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000600004Journal of the Brazilian Chemical Society v.17 n.6 2006reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532006000600004info:eu-repo/semantics/openAccessBéguin,Françoiseng2006-11-29T00:00:00Zoai:scielo:S0103-50532006000600004Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2006-11-29T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Application of nanotextured carbons for electrochemical energy storage in aqueous medium |
title |
Application of nanotextured carbons for electrochemical energy storage in aqueous medium |
spellingShingle |
Application of nanotextured carbons for electrochemical energy storage in aqueous medium Béguin,François nanotextured carbons energy storage hybrid supercapacitor |
title_short |
Application of nanotextured carbons for electrochemical energy storage in aqueous medium |
title_full |
Application of nanotextured carbons for electrochemical energy storage in aqueous medium |
title_fullStr |
Application of nanotextured carbons for electrochemical energy storage in aqueous medium |
title_full_unstemmed |
Application of nanotextured carbons for electrochemical energy storage in aqueous medium |
title_sort |
Application of nanotextured carbons for electrochemical energy storage in aqueous medium |
author |
Béguin,François |
author_facet |
Béguin,François |
author_role |
author |
dc.contributor.author.fl_str_mv |
Béguin,François |
dc.subject.por.fl_str_mv |
nanotextured carbons energy storage hybrid supercapacitor |
topic |
nanotextured carbons energy storage hybrid supercapacitor |
description |
This paper presents a hybrid capacitor, with two different electrodes working in their optimal potential range. The negative electrode is based on the reversible hydrogen sorption which occurs at low potential values in nanoporous carbons. Galvanostatic cycling at temperatures ranging from 20 to 60 ºC demonstrates that hydrogen is weakly chemisorbed. This is confirmed by TPD on the electrode material after charging, which shows a peak due to hydrogen at 200-250 ºC. The positive electrode is a composite made of carbon nanotubes, as minor component, and MnO2. Interesting properties are given by the presence of nanotubes, such as a developed porosity, a high electrical conductivity and a good resiliency, all being very important for enhancing the power and cycle life of supercapacitors. The hybrid capacitor is able to operate at voltage values as high as 2 V in aqueous medium with a long cycle life. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-10-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000600004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000600004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532006000600004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.17 n.6 2006 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318167376265216 |