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New modified Nafion-biphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance [Resumo]

2019Conference object Open access
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dc.contributor.authorTeixeira, Fatima
dc.contributor.authorSá, A.I. De
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.accessioned2020-04-23T15:37:56Z
dc.date.available2020-04-23T15:37:56Z
dc.date.issued2019
dc.description.abstractABSTRACT: The performance of PEM fuel cells critically depends on their proton exchange membrane structural and chemical stabilities as well as on their proton conductivity. Limitations of commercially available Nafion membranes to operating at temperatures above 80 ºC have fostered the interest in research and development of new membranes [1,2]. The aim of this work is the preparation of new modified Nafion composite membranes, with a bisphosphonic acid moiety, a promising proton carrier exhibiting good proton donating/accepting properties and thermal stability. Synthesis and characterization were undertaken of a series of bisphosphonic acid derivatives and their incorporation into a Nafion matrix, by casting. The new membranes were characterized by ATR-FTIR and SEM along with their ion exchange capacity and water-uptake. The evaluation of their proton conductivity was carried out by electrochemical impedance spectroscopy, at various temperature and relative humidity (RH) conditions. The incorporation of BPs dopants enhances the proton conductivity, with all membranes exhibiting higher values than Nafion N-115, tested in the same experimental conditions. Selected membranes were integrated into a fuel cell MEA, using a single cell assembly, with an active area of 2.5x2.5 cm2 and a catalyst loading of 0.5 mgPtcm-2. Performance was evaluated, using an air fed cathode, at temperatures from 30 ºC to 80 ºC. Membrane doped with BP2 showed the best performance, with higher power density outputs than Nafion N-115 shown at all temperatures.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTeixeira, Fátima C... [et.al.] - New modified Nafion-biphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance. In: 3rd ANQUE-ICCE International Congress of Chemical Engineering, Book of Abstracts, Santander, Spain, 19-21 june, 2019, p. 420pt_PT
dc.identifier.isbn978-84-09-12430-5
dc.identifier.urihttp://hdl.handle.net/10400.9/3251
dc.language.isoengpt_PT
dc.publisherANQUE-ICCE International Congress of Chemical Engineeringpt_PT
dc.relationPEMFC-SUDOE - SOE1/P1/E0293pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectProton exchange membranept_PT
dc.subjectFuel cellspt_PT
dc.subjectPolymer electrolyte membranept_PT
dc.subjectPEMpt_PT
dc.titleNew modified Nafion-biphosphonic acid composite membranes for enhanced proton conductivity and PEMFC performance [Resumo]pt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceSantander, Spainpt_PT
oaire.citation.title3rd ANQUE-ICCE International Congress of Chemical Engineeringpt_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.typeconferenceObjectpt_PT
relation.isAuthorOfPublication3daa40f1-7bb6-488d-83d9-04a61c655d67
relation.isAuthorOfPublication5d35b81a-2f1b-4051-b8bc-d1a4b0934a01
relation.isAuthorOfPublicationd8ff15d1-5d27-4e57-8654-f0f85fd79510
relation.isAuthorOfPublication804e595a-d539-46a2-ae78-6cadc8ca9457
relation.isAuthorOfPublication.latestForDiscovery3daa40f1-7bb6-488d-83d9-04a61c655d67

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