New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance

Detalhes bibliográficos
Autor(a) principal: Teixeira, Fatima
Data de Publicação: 2021
Outros Autores: de Sá, A.I., Teixeira, António P. S., Ortiz-Martínez, V. M., Ortiz, A., Ortiz, Inmaculada, 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/10400.9/3679
Resumo: ABSTRACT: Proton exchange membranes remain a crucial material and a key challenge to fuel cell science and technology. In this work, new Nafion membranes are prepared by a casting method using aryl- or azaheteroaromatic bisphosphonate compounds as dopants. The incorporation of the dopant, considered at 1 wt% loading after previous selection, produces enhanced proton conductivity properties in the new membranes, at different temperature and relative humidity conditions, in comparison with values obtained with commercial Nafion. Water uptake and ionic exchange capacity (IEC) are also assessed due to their associated impact on transport properties, resulting in superior values than Nafion when tested in the same experimental conditions. These improvements by doped membranes prompted the evaluation of their potential application in fuel cells, at different temperatures. The new membranes, in membrane-electrode assemblies (MEAs), show an increased fuel cell maximum power output with temperature until 60 degrees C or 70 degrees C, followed by a decrease above these temperatures, a Nafion-like behaviour when measured in the same conditions. The membrane doped with [1,4-phenylenebis(hydroxymethanetriyl)] tetrakis(phosphonic acid) (BP2) presents better results than Nafion N-115 membrane at all studied temperatures, with a maximum power output performance of similar to 383 mW cm(-2) at 70 degrees C. Open circuit potentials of the fuel cell were always higher than values obtained for Nafion MEAs in all studied conditions, indicating the possibility of advantageous restrain to gas crossover in the new doped membranes.
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spelling New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performanceFuel cellsProton exchange membranePolymer electrolyte membraneNafionBisphosphonatesABSTRACT: Proton exchange membranes remain a crucial material and a key challenge to fuel cell science and technology. In this work, new Nafion membranes are prepared by a casting method using aryl- or azaheteroaromatic bisphosphonate compounds as dopants. The incorporation of the dopant, considered at 1 wt% loading after previous selection, produces enhanced proton conductivity properties in the new membranes, at different temperature and relative humidity conditions, in comparison with values obtained with commercial Nafion. Water uptake and ionic exchange capacity (IEC) are also assessed due to their associated impact on transport properties, resulting in superior values than Nafion when tested in the same experimental conditions. These improvements by doped membranes prompted the evaluation of their potential application in fuel cells, at different temperatures. The new membranes, in membrane-electrode assemblies (MEAs), show an increased fuel cell maximum power output with temperature until 60 degrees C or 70 degrees C, followed by a decrease above these temperatures, a Nafion-like behaviour when measured in the same conditions. The membrane doped with [1,4-phenylenebis(hydroxymethanetriyl)] tetrakis(phosphonic acid) (BP2) presents better results than Nafion N-115 membrane at all studied temperatures, with a maximum power output performance of similar to 383 mW cm(-2) at 70 degrees C. Open circuit potentials of the fuel cell were always higher than values obtained for Nafion MEAs in all studied conditions, indicating the possibility of advantageous restrain to gas crossover in the new doped membranes.ElsevierRepositório do LNEGTeixeira, Fatimade Sá, A.I.Teixeira, António P. S.Ortiz-Martínez, V. M.Ortiz, A.Ortiz, InmaculadaRangel, C. M.2022-01-07T16:24:25Z2021-05-01T00:00:00Z2021-05-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/3679engTeixeira, Fátima C... [et.al.] - New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance. In: International Journal of Hydrogen Energy, 2021, Vol. 46, p. 17562-175710360-319910.1016/j.ijhydene.2020.01.2121879-3487info: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:RCAAP2022-09-06T12:29:24Zoai:repositorio.lneg.pt:10400.9/3679Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:36:53.646379Repositório 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 New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance
title New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance
spellingShingle New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance
Teixeira, Fatima
Fuel cells
Proton exchange membrane
Polymer electrolyte membrane
Nafion
Bisphosphonates
title_short New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance
title_full New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance
title_fullStr New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance
title_full_unstemmed New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance
title_sort New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance
author Teixeira, Fatima
author_facet Teixeira, Fatima
de Sá, A.I.
Teixeira, António P. S.
Ortiz-Martínez, V. M.
Ortiz, A.
Ortiz, Inmaculada
Rangel, C. M.
author_role author
author2 de Sá, A.I.
Teixeira, António P. S.
Ortiz-Martínez, V. M.
Ortiz, A.
Ortiz, Inmaculada
Rangel, C. M.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório do LNEG
dc.contributor.author.fl_str_mv Teixeira, Fatima
de Sá, A.I.
Teixeira, António P. S.
Ortiz-Martínez, V. M.
Ortiz, A.
Ortiz, Inmaculada
Rangel, C. M.
dc.subject.por.fl_str_mv Fuel cells
Proton exchange membrane
Polymer electrolyte membrane
Nafion
Bisphosphonates
topic Fuel cells
Proton exchange membrane
Polymer electrolyte membrane
Nafion
Bisphosphonates
description ABSTRACT: Proton exchange membranes remain a crucial material and a key challenge to fuel cell science and technology. In this work, new Nafion membranes are prepared by a casting method using aryl- or azaheteroaromatic bisphosphonate compounds as dopants. The incorporation of the dopant, considered at 1 wt% loading after previous selection, produces enhanced proton conductivity properties in the new membranes, at different temperature and relative humidity conditions, in comparison with values obtained with commercial Nafion. Water uptake and ionic exchange capacity (IEC) are also assessed due to their associated impact on transport properties, resulting in superior values than Nafion when tested in the same experimental conditions. These improvements by doped membranes prompted the evaluation of their potential application in fuel cells, at different temperatures. The new membranes, in membrane-electrode assemblies (MEAs), show an increased fuel cell maximum power output with temperature until 60 degrees C or 70 degrees C, followed by a decrease above these temperatures, a Nafion-like behaviour when measured in the same conditions. The membrane doped with [1,4-phenylenebis(hydroxymethanetriyl)] tetrakis(phosphonic acid) (BP2) presents better results than Nafion N-115 membrane at all studied temperatures, with a maximum power output performance of similar to 383 mW cm(-2) at 70 degrees C. Open circuit potentials of the fuel cell were always higher than values obtained for Nafion MEAs in all studied conditions, indicating the possibility of advantageous restrain to gas crossover in the new doped membranes.
publishDate 2021
dc.date.none.fl_str_mv 2021-05-01T00:00:00Z
2021-05-01T00:00:00Z
2022-01-07T16:24:25Z
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/10400.9/3679
url http://hdl.handle.net/10400.9/3679
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Teixeira, Fátima C... [et.al.] - New modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance. In: International Journal of Hydrogen Energy, 2021, Vol. 46, p. 17562-17571
0360-3199
10.1016/j.ijhydene.2020.01.212
1879-3487
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
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