Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells

Detalhes bibliográficos
Autor(a) principal: Teixeira, Fatima
Data de Publicação: 2019
Outros Autores: Sá, A.I. De, Teixeira, António P. S., Rangel, C. M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.9/3185
Resumo: ABSTRACT: In this work, new doped Nafion membranes with enhanced proton conductivity were prepared to be used as proton exchange membranes in fuel cells. New dopants derived from arylmono-or bisphosphonic acid were prepared and incorporated into the new membranes using impregnation or casting methods. Proton conductivities were assessed by Electrochemical Impedance Spectroscopy (EIS), at different temperatures and relative humidity (RH) conditions, in order to evaluate the influence of the structure and the method of the preparation on proton transport. The membranes prepared by casting showed higher proton conductivities than commercial Nafion membrane at all temperatures and relative humidity conditions studied. The [1,4-phenylenebis-(hydroxymethanetriyl)] tetrakis(phosphonic acid) (BP2) showed the best proton conductivity with a value of 87 mS cm(-1). The values obtained for the activation energy (Ea) for proton conduction suggests that transport occurs via both Grotthuss and vehicular mechanisms.
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spelling Nafion phosphonic acid composite membranes for proton exchange membranes fuel cellsFuel cellsPolymer electrolyte membraneProton exchange membraneABSTRACT: In this work, new doped Nafion membranes with enhanced proton conductivity were prepared to be used as proton exchange membranes in fuel cells. New dopants derived from arylmono-or bisphosphonic acid were prepared and incorporated into the new membranes using impregnation or casting methods. Proton conductivities were assessed by Electrochemical Impedance Spectroscopy (EIS), at different temperatures and relative humidity (RH) conditions, in order to evaluate the influence of the structure and the method of the preparation on proton transport. The membranes prepared by casting showed higher proton conductivities than commercial Nafion membrane at all temperatures and relative humidity conditions studied. The [1,4-phenylenebis-(hydroxymethanetriyl)] tetrakis(phosphonic acid) (BP2) showed the best proton conductivity with a value of 87 mS cm(-1). The values obtained for the activation energy (Ea) for proton conduction suggests that transport occurs via both Grotthuss and vehicular mechanisms.ElsevierRepositório do LNEGTeixeira, FatimaSá, A.I. DeTeixeira, António P. S.Rangel, C. M.2020-03-17T10:10:31Z2019-01-01T00:00:00Z2019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/3185engTeixeira, Fátima C... [et.al.] - Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells. In: Applied Surface Science, 2019, Vol. 487, p. 889-8970169-433210.1016/j.apsusc.2019.05.078info: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:RCAAP2022-09-06T12:28:36Zoai:repositorio.lneg.pt:10400.9/3185Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:36:25.119430Repositório 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 Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells
title Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells
spellingShingle Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells
Teixeira, Fatima
Fuel cells
Polymer electrolyte membrane
Proton exchange membrane
title_short Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells
title_full Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells
title_fullStr Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells
title_full_unstemmed Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells
title_sort Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells
author Teixeira, Fatima
author_facet Teixeira, Fatima
Sá, A.I. De
Teixeira, António P. S.
Rangel, C. M.
author_role author
author2 Sá, A.I. De
Teixeira, António P. S.
Rangel, C. M.
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório do LNEG
dc.contributor.author.fl_str_mv Teixeira, Fatima
Sá, A.I. De
Teixeira, António P. S.
Rangel, C. M.
dc.subject.por.fl_str_mv Fuel cells
Polymer electrolyte membrane
Proton exchange membrane
topic Fuel cells
Polymer electrolyte membrane
Proton exchange membrane
description ABSTRACT: In this work, new doped Nafion membranes with enhanced proton conductivity were prepared to be used as proton exchange membranes in fuel cells. New dopants derived from arylmono-or bisphosphonic acid were prepared and incorporated into the new membranes using impregnation or casting methods. Proton conductivities were assessed by Electrochemical Impedance Spectroscopy (EIS), at different temperatures and relative humidity (RH) conditions, in order to evaluate the influence of the structure and the method of the preparation on proton transport. The membranes prepared by casting showed higher proton conductivities than commercial Nafion membrane at all temperatures and relative humidity conditions studied. The [1,4-phenylenebis-(hydroxymethanetriyl)] tetrakis(phosphonic acid) (BP2) showed the best proton conductivity with a value of 87 mS cm(-1). The values obtained for the activation energy (Ea) for proton conduction suggests that transport occurs via both Grotthuss and vehicular mechanisms.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-01T00:00:00Z
2019-01-01T00:00:00Z
2020-03-17T10:10:31Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.9/3185
url http://hdl.handle.net/10400.9/3185
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Teixeira, Fátima C... [et.al.] - Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells. In: Applied Surface Science, 2019, Vol. 487, p. 889-897
0169-4332
10.1016/j.apsusc.2019.05.078
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.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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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