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Discussion on a Percolating Conducting Network of a Composite Thin-Film Electrode (<= 1 mu m) for Micro-Solid Oxide Fuel Cell Application

Abstract : Ni/Gd0.1Ce0.9O2-delta,5 (Ni/GDC) and La0.6Sr0.4Fe0.8Co0.2O3-delta/Gd0.1Ce0.9O2-delta (LSCF/GDC) porous thin-film electrodes with thicknesses between 120 and 500 nm were synthesized through templated sol-gel chemistry coupled with the dip-coating process and heat treatment. The thin films consist of two interpenetrated networks made of pores and inorganic materials. The porous structure was composed of multi-scale pores with dimensions ranging from macro- to nanosize and with an oriented columnar structure. The dimension of the percolation network is discussed as a function of the chemical nature of the percolating components and the particle/thickness ratio. A three-dimensional percolation network is achieved in the LSCF/GDC composite, while a two-dimensional percolation network is observed for the Ni/GDC composite. This difference is related to the microstructure of the composite thin film. An anisotropic columnar structure is observed for Ni/GDC, while an isotropic structure is achieved for LSCF/GDC.
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https://hal.archives-ouvertes.fr/hal-01289949
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Submitted on : Thursday, March 17, 2016 - 2:16:53 PM
Last modification on : Tuesday, September 22, 2020 - 3:40:01 AM

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Guillaume Muller, Armelle Ringuedé, Christel Laberty-Robert. Discussion on a Percolating Conducting Network of a Composite Thin-Film Electrode (<= 1 mu m) for Micro-Solid Oxide Fuel Cell Application. Langmuir, American Chemical Society, 2014, 30 (29), pp.8889-8897. ⟨10.1021/la500192d⟩. ⟨hal-01289949⟩

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