An impedance study on the sPEEK/ZrO2 membranes for direct methanol fuel cell applications

Detalhes bibliográficos
Autor(a) principal: V. B. Silva
Data de Publicação: 2008
Outros Autores: V. S. Silva, L. M. Madeira, S. P. Nunes, A. Mendes
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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spelling 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
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dc.identifier.uri.fl_str_mv https://repositorio-aberto.up.pt/handle/10216/67176
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dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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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
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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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
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