BOEHM, Emmanuelle; BASSAT, Jean-Marc.; DORDOR, Patrice; MAUVY, Fabrice; GRENIER, Jean-Claude; STEVENS, Philippe

doi:10.1016/j.ssi.2005.06.033

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BOEHM, Emmanuelle
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

BASSAT, Jean-Marc.
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DORDOR, Patrice
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Solid State Ionics. 2005, vol. 176, n° 37-38, p. 2717-2725

Elsevier

Résumé en anglais

Materials formulated Ln2−x−yyCaxNiO4+δ (with (i) x = y = 0 for Ln = La, Pr, Nd, (ii) x ≠ 0 when y = 0 or y ≠ 0 when x = 0 for Ln = Nd) have been prepared and characterized using various techniques with respect to their mixed ionic/electronic conducting properties. These oxides exhibit high electronic conductivity (≈ 100 S cm− 1 at T = 700 °C) as well as high values of oxygen diffusion and surface exchange coefficients (D* and k, determined using SIMS analysis of the 18O isotope). The oxygen diffusion performances of Pr2NiO4+δ are the highest ones among those of the studied compounds. Interestingly, in the Nd-series they are slightly improved by the creation of Nd vacancies, while they are affected by the substitution of Nd by Ca.< Réduire

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Mixed conducting oxides

Oxygen transport properties

Oxygen reduction

Rare-earth nickelates

SOFC

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Oxygen diffusion and transport properties in non-stoichiometric Ln2−xNiO4+δ oxides

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