Nanostructured ceria based thin films ({<=}1 {mu}m) As cathode/electrolyte interfaces

Journal Article · Tue Jan 15 00:00:00 EST 2013 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2012.08.021· OSTI ID:22131164

Hierso, J. ^[1]; Boy, P.; Valle, K. ^[2]; Vulliet, J.; Blein, F. ^[3]; Sanchez, C. ^[1]

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1. Laboratoire de Chimie de la Matiere Condensee de Paris, Universite Paris 6-UMR 7574-College de France, 11 Place Marcelin Berthelot, 75005 Paris (France)
2. CEA-Le Ripault, LSCG, BP 15, 37000 Monts (France)
3. CEA-Le Ripault, LCCA, BP 15, 37000 Monts (France)

Gadolinium doped cerium oxide (CGO: Ce{sub 0,9}Gd{sub 0,1}O{sub 2-{delta}}) films were used as an oxygen anion diffusion layer at the cathode/electrolyte interface of Solid Oxide Fuel Cells (SOFCs), between LSCF (lanthanum strontium cobalt ferrite) and YSZ (yttria-stabilized zirconia). Thin ({approx}100 nm) and thick ({approx}700 nm) mesoporous CGO layers were synthesized through a sol-gel process including organic template coupled with the dip-coating method. Structural and microstructural characterizations were performed, highlighting a well-bonded crystalline CGO nanoparticles network which delineates a 3-D inter-connected mesoporous network. Their electrical behaviors were investigated by impedance spectroscopy analysis of YSZ/mesoporous-CGO/LSCF half-cell. Anode-supported SOFCs, operating at 800 Degree-Sign C, with either dense or mesoporous CGO dip-coated interlayers were also fabricated [NiO-YSZ anode/YSZ/CGO/LSCF cathode]. The impact of the mesoporous CGO interlayers on SOFCs performances was investigated by galvanostatic analysis and compared to the behavior of a dense CGO interlayer. The polarization curves revealed an enhancement in the electrical performance of the cell, which is assigned to a decrease of the polarization resistance at the cathode/electrolyte interface. The integrity and connectivity of the CGO nanoparticles bonded network facilitates O{sup 2-} transport across the interface. - Graphical abstract: Thin and thick CGO films have been prepared through a sol-gel process and their potential application as SOFC cathode/electrolyte interlayer in SOFC has been investigated. Highlights: Black-Right-Pointing-Pointer Mesoporous ceria based thin films exhibit interesting performances for Solid Oxide Fuel Cell. Black-Right-Pointing-Pointer Mesoporous films were synthesized through the sol-gel process combined with the dip-coating. Black-Right-Pointing-Pointer Integrity and connectivity of the nanoparticles facilitates O{sup 2-} transport across the interface.

• OSTI ID: 22131164
• Journal Information: Journal of Solid State Chemistry, Vol. 197; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
CERIUM OXIDES
DOPED MATERIALS
FERRITE
FERRITES
GADOLINIUM
INTERFACES
LANTHANUM
NANOSTRUCTURES
NICKEL OXIDES
POLYSTYRENE
SCANNING ELECTRON MICROSCOPY
SOLID OXIDE FUEL CELLS
STRONTIUM
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
YTTRIUM OXIDES
ZIRCONIUM OXIDES