SHARMA, Rakesh K.; CHEAH, Seng-Kian; BURRIEL, Mónica; DESSEMOND, Laurent; BASSAT, Jean-Marc.; DJURADO, Elisabeth

doi:10.1039/c6ta08011a

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SHARMA, Rakesh K.
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]

CHEAH, Seng-Kian
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]

BURRIEL, Mónica
Laboratoire des matériaux et du génie physique [LMGP ]

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Ce document a été publié dans

Journal of Materials Chemistry A. 2017, vol. 5, n° 3, p. 1120–1132

Royal Society of Chemistry

Résumé en anglais

Architecturally designed La2−xPrxNiO4+δ (with x = 0, 0.5, 1 and 2) cathodes on the Ce0.9Gd0.1O2−δ (CGO) electrolyte have been prepared with a view to take advantage of the complimentary properties of the two extreme compositions La2NiO4+δ and Pr2NiO4+δ, i.e. the superior stability of La2NiO4+δ and the higher electronic conductivity of Pr2NiO4+δ. The design consists of stacking of two layers starting with a 3D tree-like microstructure (∼20 μm thick) over a thin dense base layer (∼100 nm) fabricated in one step by electrostatic spray deposition (ESD) and then topped by using a screen-printed (SP) current collecting layer of the same composition. X-ray diffraction confirms the formation of a complete solid solution crystallizing in a single phase orthorhombic structure with the Fmmm space group. The thermodynamic stability and polarisation resistance (Rpol) decrease by increasing the Pr content. Among the complete La2−xPrxNiO4+δ solid solutions, LaPrNiO4+δ shows the best compromise between electrochemical properties (the lowest Rpol value available in the literature for this composition, 0.12 Ω cm2 at 600 °C) and thermodynamic stability in air. Moreover, an anode supported single cell (Ni-3YSZ/Ni-8YSZ/8YSZ/CGO) including the LaPrNiO4+δ double layer electrode shows a maximum power density of 438 mW cm−2 at 700 °C.< Réduire

DOI

http://dx.doi.org/10.1039/c6ta08011a

Project ANR

Center of Excellence in Multifunctional Architectured Materials - ANR-10-LABX-0044

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Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026