Composition and porosity graded La2−xNiO4+δ (x≥0) interlayers for SOFC: Control of the microstructure via a sol–gel process - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Power Sources Année : 2006

Composition and porosity graded La2−xNiO4+δ (x≥0) interlayers for SOFC: Control of the microstructure via a sol–gel process

C. Laberty-Robert
  • Fonction : Auteur
Florence Ansart
  • Fonction : Auteur
P. Tailhades

Résumé

We have developed composition and porosity graded La2−xNiO4+δ (x≥0) cathode interlayers for low-temperature solid oxide fuel cell that exhibit good adhesion with the electrolyte, controlled porosity and grain size and good electrochemical behaviour. La2−xNiO4+δ (x≥0) monolayers are elaborated from a derived sol–gel method using nitrate salts, acetylacetone and hexamethylenetetramine in acetic acid. As a function of the organic concentration and the molar ratio of lanthanum to nickel, these layers present platelets or spherical shape grains with a size distribution ranging from 50 to 200 nm, as verified by SEM-FEG. On the basis of this processing protocol, we prepared porosity and composition graded lanthanum nickelates interlayers with effective control of the pore distribution, the nanocrystalline phase, the thickness and the subsequent electrochemical properties.

Domaines

Matériaux
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Dates et versions

hal-00274185 , version 1 (03-03-2022)

Identifiants

Citer

M.L. Fontaine, C. Laberty-Robert, Florence Ansart, P. Tailhades. Composition and porosity graded La2−xNiO4+δ (x≥0) interlayers for SOFC: Control of the microstructure via a sol–gel process. Journal of Power Sources, 2006, 156 (1), pp.33-38. ⟨10.1016/j.jpowsour.2005.08.016⟩. ⟨hal-00274185⟩
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