Characterization of the morphological modification induced by long term operations on phosphoric acid fuel cell (PAFC) electrodes (Articolo in rivista)

Type
Label
  • Characterization of the morphological modification induced by long term operations on phosphoric acid fuel cell (PAFC) electrodes (Articolo in rivista) (literal)
Anno
  • 1990-01-01T00:00:00+01:00 (literal)
Alternative label
  • Alderucci V.a, Recupero V.a, Pino L.a, Di Leonardo R.a, Cocke D.L.a, Giordano,N.a, Parmigiani F.b (1990)
    Characterization of the morphological modification induced by long term operations on phosphoric acid fuel cell (PAFC) electrodes
    in Journal of Applied Electrochemistry
    (literal)
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  • Alderucci V.a, Recupero V.a, Pino L.a, Di Leonardo R.a, Cocke D.L.a, Giordano,N.a, Parmigiani F.b (literal)
Pagina inizio
  • 811 (literal)
Pagina fine
  • 817 (literal)
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  • 20 (literal)
Rivista
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  • 5 (literal)
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  • a CNR Institute of Transformation and Storage of Energy, via S. Lucia sopra Contesse 39, Lucia Messina, 98126 S, Italy b Materials Department CISE Tecnologie Innovative S.p.A., via Reggio Emilia 39-Segrate, Milano, 20131, Italy (literal)
Titolo
  • Characterization of the morphological modification induced by long term operations on phosphoric acid fuel cell (PAFC) electrodes (literal)
Abstract
  • The modification of the morphological and adhesive binding of PAFC electrodes has been studied by electron spectroscopy and electron microscopy with regard to their endurance and preparative treatments. The corrosion of the electrodes has been found to dramatically affect the electrical and adhesive contact between PTFE (polytetrafluoroethylene) and active carbon. This has been detected in X-ray photoelectron spectroscopy (XPS) by the 'charging' shift seen for F 1 s due to the loss in electronic contact between these components. In addition, the adhesive character of the contact between the SiC matrix and the gas diffusion electrodes has been revealed by the XPS spectral characteristics. Here a major difference between the anode and the cathode has been observed with the cathode having a greater deadhesion. Extensive physical characterization by pore volume and size distribution, wetting, and weight loss has been performed. These results have been correlated with the XPS results to give a complete model of the deterioration of this technologically important system. A possible explanation for the observed loss of PTFE from the surface of the cathode based on an electrostatic rejection model of the delaminated PTFE particles is also suggested. (literal)
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