Nanostructured ceria based thin films (<= 1 mu m) As cathode/electrolyte interfaces - Archive ouverte HAL
Article Dans Une Revue Journal of Solid State Chemistry Année : 2013

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

P. Boy
  • Fonction : Auteur
K. Vallé
  • Fonction : Auteur
J. Vulliet
  • Fonction : Auteur
F. Blein
  • Fonction : Auteur
Ch. Laberty-Robert
  • Fonction : Auteur
C. Sanchez
  • Fonction : Auteur
  • PersonId : 978874

Résumé

Gadolinium doped cerium oxide (CGO: Ce0.9Gd0.1O2-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 (similar to 100 nm) and thick (similar to 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 degrees 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 O2- transport across the interface. (C) 2012 Elsevier Inc. All rights reserved.

Domaines

Matériaux
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Dates et versions

hal-01289752 , version 1 (17-03-2016)

Identifiants

Citer

J. Hierso, P. Boy, K. Vallé, J. Vulliet, F. Blein, et al.. Nanostructured ceria based thin films (<= 1 mu m) As cathode/electrolyte interfaces. Journal of Solid State Chemistry, 2013, 197, pp.113-119. ⟨10.1016/j.jssc.2012.08.021⟩. ⟨hal-01289752⟩
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