Cristin-resultat-ID: 1107405
Sist endret: 13. januar 2015, 14:03
NVI-rapporteringsår: 2014
Resultat
Vitenskapelig artikkel
2014

Hydrogen oxidation kinetics and performance of Ni-LaNbO4 cermet anodes for proton conducting SOFCs

Bidragsytere:
  • Anna Magraso
  • Marie-Laure Fontaine
  • Reidar Haugsrud og
  • Truls Norby

Tidsskrift

Journal of the Electrochemical Society
ISSN 0013-4651
e-ISSN 1945-7111
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2014
Volum: 161
Hefte: 4
Sider: F373 - F379

Importkilder

Scopus-ID: 2-s2.0-84893785016

Beskrivelse Beskrivelse

Tittel

Hydrogen oxidation kinetics and performance of Ni-LaNbO4 cermet anodes for proton conducting SOFCs

Sammendrag

Ni composite anodes for Ca-doped LaNbO4 (LCNO) based proton conducting solid oxide fuel cells were fabricated as screen-printed Ni-LCNO cermets on a dense self-supported LCNO electrolyte and as a semi-symmetrical cell consisting of a ∼ 15 μm thick LCNO electrolyte deposited on a tape-cast Ni-LCNO anode support. The influence of Ni content and sintering temperature on the polarization resistance of the Ni-LCNO interface was investigated. The interface was characterized by electrochemical impedance spectroscopy, and the effects of temperature, pO2 and pH2O on the area specific resistance (ASR) at open circuit were used to determine the rate limiting steps of the hydrogen kinetics of these anodes. The total electrode response is 1.1 Ωcm2 for 40/60 (vol) Ni/LCNO cermet support, at 800°C in wet H2, and the activation energy ∼ 0.5 eV. Three processes were suggested to contribute to the polarization resistance of Ni-LCNO cermet anodes, the most resistive believed to correspond to a charge transfer process at the interface between hydrogen atoms on or in Ni and protons in the electrolyte.

Bidragsytere

Anna Magraso Sola

Bidragsyterens navn vises på dette resultatet som Anna Magraso
  • Tilknyttet:
    Forfatter
    ved Kjemisk institutt ved Universitetet i Oslo

Marie-Laure Fontaine

  • Tilknyttet:
    Forfatter
    ved Bærekraftig energiteknologi ved SINTEF AS

Reidar Haugsrud

  • Tilknyttet:
    Forfatter
    ved Kjemisk institutt ved Universitetet i Oslo

Truls Norby

  • Tilknyttet:
    Forfatter
    ved Kjemisk institutt ved Universitetet i Oslo
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