Structural and electrochemical investigation on re-cast Nafion membranes for polymer electrolyte fuel cells (PEFCs) application (Articolo in rivista)

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  • Structural and electrochemical investigation on re-cast Nafion membranes for polymer electrolyte fuel cells (PEFCs) application (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.memsci.2005.10.047 (literal)
Alternative label
  • A. Saccà ; A. Carbone ; R. Pedicini ; G. Portale ; L. D'’Ilario ; A. Longo ; A. Martorana ; E. Passalacqua (2006)
    Structural and electrochemical investigation on re-cast Nafion membranes for polymer electrolyte fuel cells (PEFCs) application
    in Journal of membrane science (Print); ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • A. Saccà ; A. Carbone ; R. Pedicini ; G. Portale ; L. D'’Ilario ; A. Longo ; A. Martorana ; E. Passalacqua (literal)
Pagina inizio
  • 105 (literal)
Pagina fine
  • 113 (literal)
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  • 278 (literal)
Rivista
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  • 9 (literal)
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  • 1-2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR -ITAE ; Università di Roma La Sapienza, Dipartimento Chimica ; CNR - ISMN ; Università di Palermo, Dipartimento Chimica Inorganica (literal)
Titolo
  • Structural and electrochemical investigation on re-cast Nafion membranes for polymer electrolyte fuel cells (PEFCs) application (literal)
Abstract
  • Starting from a 5 wt% ion power Nafion® solution and dissolving the dry residue in a suitable solvent (10 wt% solution in dimethylacetammide), re-cast Nafion films were developed for polymer electrolyte fuel cells (PEFCs) application. The used Doctor-Blade casting technique allowed to prepare scaled-up membranes comparable to the commercial Nafion ones with good mechanical resistance, thickness homogeneity and an excellent reproducibility. The differences between the re-cast membrane nanostructure and that of the commercial Nafion were investigated by synchrotron small-angle X-ray scattering. The obtained re-cast membrane shows at ambient conditions a semi-crystalline structure with a typical correlation length of about 86 °A and an intercluster Bragg distance of 37A° , quite different from the values of commercial film. Observation on the swelling of the films revealed that the semi-crystalline structure, once soaked in water, swells less than the ionomeric part, leading to an unusual small-angle X-ray scattering (SAXS) profile in which the matrix and the ionomer peak are significantly overlapped. The ionic conductivity measured at T=80 oC shows slightly higher values for the re-cast Nafion membrane. A power density of about 0.490Wcm-2 at 0.6V and at T=80 oC in humidified hydrogen/air was obtained for the developed membrane. (literal)
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