Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/106578 |
Resumo: | Exfoliated nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) and montmorillonite (MMT) have been prepared by in situ anodic polymerization, concentrations of clay ranging from 5% w/w to 50% w/w being included in the aqueous polymerization medium. The morphology, electrical conductivity, adherence, thermal stability, charge storage, specific capacitance, electrostability, doping level and band gap have been determined for the different PEDOT–MMT nanocomposites and compared with those of pristine PEDOT. Many of these properties have been found to depend on both the concentration of clay and the thickness (micrometric or nanometric) of the generated films. Types I and II ultracapacitors have been fabricated using nanometric and micrometric films of PEDOT and PEDOT–MMT. The properties of such devices have been characterized and compared with those reported in the literature for ultracapacitors fabricated using nanocomposites of PEDOT and other inorganic materials. Both nanometric and micrometric type II ultracapacitors, which correspond to an asymmetric configuration of PEDOT and PEDOT–MMT films, have been found to present the better properties (e.g. the specific capacitance for nanometric and micrometric devices is 429 and 116 F gˉ¹ , respectively), evidencing the favorable effect of the clay. Finally, the effects of the electrochemical degradation on the ultracapacitors have been rationalized using electrochemical impedance spectroscopy. |
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Aradilla, DavidAzambuja, Denise SchermannEstrany, FrancescCasas, María T.Ferreira, Carlos ArthurAlemán, Carlos2014-11-11T02:14:05Z20120959-9428http://hdl.handle.net/10183/106578000934299Exfoliated nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) and montmorillonite (MMT) have been prepared by in situ anodic polymerization, concentrations of clay ranging from 5% w/w to 50% w/w being included in the aqueous polymerization medium. The morphology, electrical conductivity, adherence, thermal stability, charge storage, specific capacitance, electrostability, doping level and band gap have been determined for the different PEDOT–MMT nanocomposites and compared with those of pristine PEDOT. Many of these properties have been found to depend on both the concentration of clay and the thickness (micrometric or nanometric) of the generated films. Types I and II ultracapacitors have been fabricated using nanometric and micrometric films of PEDOT and PEDOT–MMT. The properties of such devices have been characterized and compared with those reported in the literature for ultracapacitors fabricated using nanocomposites of PEDOT and other inorganic materials. Both nanometric and micrometric type II ultracapacitors, which correspond to an asymmetric configuration of PEDOT and PEDOT–MMT films, have been found to present the better properties (e.g. the specific capacitance for nanometric and micrometric devices is 429 and 116 F gˉ¹ , respectively), evidencing the favorable effect of the clay. Finally, the effects of the electrochemical degradation on the ultracapacitors have been rationalized using electrochemical impedance spectroscopy.application/pdfengJournal of Materials Chemistry. [Cambridge]. Vol. 22, no. 26 (July 2012), p. 13110-13122Físico-químicaQuímica macromolecularNanocompósitosEspectroscopia de impedância eletroquímicaPolimerizaçãoPolitiofenoHybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devicesEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000934299.pdf000934299.pdfTexto completo (inglês)application/pdf1819339http://www.lume.ufrgs.br/bitstream/10183/106578/1/000934299.pdf13fa38799a9bbd471407439b6c018270MD51TEXT000934299.pdf.txt000934299.pdf.txtExtracted Texttext/plain64738http://www.lume.ufrgs.br/bitstream/10183/106578/2/000934299.pdf.txtdb785698b3c67e7d698faddce17d9991MD52THUMBNAIL000934299.pdf.jpg000934299.pdf.jpgGenerated Thumbnailimage/jpeg2087http://www.lume.ufrgs.br/bitstream/10183/106578/3/000934299.pdf.jpg8d2913d686f6f10a302da82d51a57214MD5310183/1065782018-10-22 07:36:14.123oai:www.lume.ufrgs.br:10183/106578Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-22T10:36:14Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices |
title |
Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices |
spellingShingle |
Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices Aradilla, David Físico-química Química macromolecular Nanocompósitos Espectroscopia de impedância eletroquímica Polimerização Politiofeno |
title_short |
Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices |
title_full |
Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices |
title_fullStr |
Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices |
title_full_unstemmed |
Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices |
title_sort |
Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices |
author |
Aradilla, David |
author_facet |
Aradilla, David Azambuja, Denise Schermann Estrany, Francesc Casas, María T. Ferreira, Carlos Arthur Alemán, Carlos |
author_role |
author |
author2 |
Azambuja, Denise Schermann Estrany, Francesc Casas, María T. Ferreira, Carlos Arthur Alemán, Carlos |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Aradilla, David Azambuja, Denise Schermann Estrany, Francesc Casas, María T. Ferreira, Carlos Arthur Alemán, Carlos |
dc.subject.por.fl_str_mv |
Físico-química Química macromolecular Nanocompósitos Espectroscopia de impedância eletroquímica Polimerização Politiofeno |
topic |
Físico-química Química macromolecular Nanocompósitos Espectroscopia de impedância eletroquímica Polimerização Politiofeno |
description |
Exfoliated nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) and montmorillonite (MMT) have been prepared by in situ anodic polymerization, concentrations of clay ranging from 5% w/w to 50% w/w being included in the aqueous polymerization medium. The morphology, electrical conductivity, adherence, thermal stability, charge storage, specific capacitance, electrostability, doping level and band gap have been determined for the different PEDOT–MMT nanocomposites and compared with those of pristine PEDOT. Many of these properties have been found to depend on both the concentration of clay and the thickness (micrometric or nanometric) of the generated films. Types I and II ultracapacitors have been fabricated using nanometric and micrometric films of PEDOT and PEDOT–MMT. The properties of such devices have been characterized and compared with those reported in the literature for ultracapacitors fabricated using nanocomposites of PEDOT and other inorganic materials. Both nanometric and micrometric type II ultracapacitors, which correspond to an asymmetric configuration of PEDOT and PEDOT–MMT films, have been found to present the better properties (e.g. the specific capacitance for nanometric and micrometric devices is 429 and 116 F gˉ¹ , respectively), evidencing the favorable effect of the clay. Finally, the effects of the electrochemical degradation on the ultracapacitors have been rationalized using electrochemical impedance spectroscopy. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012 |
dc.date.accessioned.fl_str_mv |
2014-11-11T02:14:05Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/106578 |
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0959-9428 |
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000934299 |
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url |
http://hdl.handle.net/10183/106578 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of Materials Chemistry. [Cambridge]. Vol. 22, no. 26 (July 2012), p. 13110-13122 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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