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

2021-05Journal article Open access
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dc.contributor.authorTeixeira, Fatima
dc.contributor.authorde Sá, A.I.
dc.contributor.authorTeixeira, António P. S.
dc.contributor.authorOrtiz-Martínez, V. M.
dc.contributor.authorOrtiz, A.
dc.contributor.authorOrtiz, Inmaculada
dc.contributor.authorRangel, C. M.
dc.date.accessioned2022-01-07T16:24:25Z
dc.date.available2022-01-07T16:24:25Z
dc.date.issued2021-05
dc.description.abstractABSTRACT: 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTeixeira, 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. 17562-17571pt_PT
dc.identifier.doi10.1016/j.ijhydene.2020.01.212pt_PT
dc.identifier.eissn1879-3487
dc.identifier.issn0360-3199
dc.identifier.urihttp://hdl.handle.net/10400.9/3679
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPEMFC-SUDOE -SOE1/P1/E0293pt_PT
dc.relation.publisherversionhttps://doi.org/10.1016/j.ijhydene.2020.01.212pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectFuel cellspt_PT
dc.subjectProton exchange membranept_PT
dc.subjectPolymer electrolyte membranept_PT
dc.subjectNafionpt_PT
dc.subjectBisphosphonatespt_PT
dc.titleNew modified Nafion-bisphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performancept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage17571pt_PT
oaire.citation.startPage17562pt_PT
oaire.citation.titleInternational Journal of Hydrogen Energypt_PT
oaire.citation.volume46pt_PT
person.familyNameTeixeira
person.familyNameSá
person.familyNameTeixeira
person.familyNameRangel
person.givenNameFatima
person.givenNameAna
person.givenNameAntónio Paulo Silva
person.givenNameCarmen M.
person.identifier.ciencia-idC014-509B-D1DC
person.identifier.ciencia-idB615-CCF2-424E
person.identifier.ciencia-idAA13-FF7C-9E29
person.identifier.orcid0000-0003-0801-2068
person.identifier.orcid0000-0003-1267-7994
person.identifier.orcid0000-0001-7448-0893
person.identifier.orcid0000-0001-7996-8142
person.identifier.ridN-5456-2014
person.identifier.ridD-5477-2011
person.identifier.scopus-author-id7102746385
person.identifier.scopus-author-id36856362300
person.identifier.scopus-author-id7006108156
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication5d35b81a-2f1b-4051-b8bc-d1a4b0934a01
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relation.isAuthorOfPublication.latestForDiscoveryd8ff15d1-5d27-4e57-8654-f0f85fd79510

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