An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , |
Tipo de documento: | Livro |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://repositorio-aberto.up.pt/handle/10216/67176 |
Resumo: | Electrochemical impedance experiments were carried out in order to study the influence of the ZrO2 inorganic incorporation on the proton conductivity of sulfonated poly(ether ether ketone) (sPEEK) membranes. The impedance data was fitted to an extension of Randles' circuit, within the inorganic content and temperature ranges considered. The model fits quite well for ZrO2 loads up to 10 wt.%. Such a model allows for characterizing the diffusion phenomena (Warburg) of the membrane electrode assembly (MEA), membrane and electrodes resistances, capacitive and inductive behavior. Proton conductivity was obtained from the impedance spectra and it was observed that it increases with temperature and decreases with the inorganic content. As a general trend, the Warburg parameter decreases slightly with the temperature, except for the 5 wt. % ZrO2 membrane that suffers a more pronounced influence, The Warburg parameter also decreases with the ZrO2 content. |
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7160 |
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An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applicationsEngenharia, Engenharia química, Engenharia químicaEngineering, Chemical engineering, Chemical engineeringElectrochemical impedance experiments were carried out in order to study the influence of the ZrO2 inorganic incorporation on the proton conductivity of sulfonated poly(ether ether ketone) (sPEEK) membranes. The impedance data was fitted to an extension of Randles' circuit, within the inorganic content and temperature ranges considered. The model fits quite well for ZrO2 loads up to 10 wt.%. Such a model allows for characterizing the diffusion phenomena (Warburg) of the membrane electrode assembly (MEA), membrane and electrodes resistances, capacitive and inductive behavior. Proton conductivity was obtained from the impedance spectra and it was observed that it increases with temperature and decreases with the inorganic content. As a general trend, the Warburg parameter decreases slightly with the temperature, except for the 5 wt. % ZrO2 membrane that suffers a more pronounced influence, The Warburg parameter also decreases with the ZrO2 content.20082008-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bookapplication/pdfhttps://repositorio-aberto.up.pt/handle/10216/67176engV. B. SilvaV. S. SilvaL. M. MadeiraS. P. NunesA. Mendesinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-29T13:27:07Zoai:repositorio-aberto.up.pt:10216/67176Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:40:46.947602Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications |
title |
An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications |
spellingShingle |
An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications V. B. Silva Engenharia, Engenharia química, Engenharia química Engineering, Chemical engineering, Chemical engineering |
title_short |
An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications |
title_full |
An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications |
title_fullStr |
An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications |
title_full_unstemmed |
An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications |
title_sort |
An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications |
author |
V. B. Silva |
author_facet |
V. B. Silva V. S. Silva L. M. Madeira S. P. Nunes A. Mendes |
author_role |
author |
author2 |
V. S. Silva L. M. Madeira S. P. Nunes A. Mendes |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
V. B. Silva V. S. Silva L. M. Madeira S. P. Nunes A. Mendes |
dc.subject.por.fl_str_mv |
Engenharia, Engenharia química, Engenharia química Engineering, Chemical engineering, Chemical engineering |
topic |
Engenharia, Engenharia química, Engenharia química Engineering, Chemical engineering, Chemical engineering |
description |
Electrochemical impedance experiments were carried out in order to study the influence of the ZrO2 inorganic incorporation on the proton conductivity of sulfonated poly(ether ether ketone) (sPEEK) membranes. The impedance data was fitted to an extension of Randles' circuit, within the inorganic content and temperature ranges considered. The model fits quite well for ZrO2 loads up to 10 wt.%. Such a model allows for characterizing the diffusion phenomena (Warburg) of the membrane electrode assembly (MEA), membrane and electrodes resistances, capacitive and inductive behavior. Proton conductivity was obtained from the impedance spectra and it was observed that it increases with temperature and decreases with the inorganic content. As a general trend, the Warburg parameter decreases slightly with the temperature, except for the 5 wt. % ZrO2 membrane that suffers a more pronounced influence, The Warburg parameter also decreases with the ZrO2 content. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008 2008-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/book |
format |
book |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://repositorio-aberto.up.pt/handle/10216/67176 |
url |
https://repositorio-aberto.up.pt/handle/10216/67176 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799135722580475904 |