Muller Guillaume, Ringuedé Armelle, Laberty-Robert Christel
Laboratoire de Chimie de La Matière Condensée de Paris, UMR7574, UPMC Univ Paris 06, Sorbonne Universités , 11 Place Marcellin Berthelot, 75231 Paris, France.
Langmuir. 2014 Jul 29;30(29):8889-97. doi: 10.1021/la500192d. Epub 2014 Jul 14.
Ni/Gd0.1Ce0.9O(2-δ) (Ni/GDC) and La0.6Sr0.4Fe0.8Co0.2O(3-δ)/Gd0.1Ce0.9O(2-δ) (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.
通过模板溶胶 - 凝胶化学结合浸涂工艺和热处理，合成了厚度在120至500纳米之间的Ni/Gd0.1Ce0.9O(2-δ)（Ni/GDC）和La0.6Sr0.4Fe0.8Co0.2O(3-δ)/Gd0.1Ce0.9O(2-δ)（LSCF/GDC）多孔薄膜电极。这些薄膜由由孔隙和无机材料构成的两个相互贯穿的网络组成。多孔结构由尺寸从宏观到纳米尺度且具有定向柱状结构的多尺度孔隙组成。渗流网络的尺寸作为渗流组分的化学性质和颗粒/厚度比的函数进行了讨论。在LSCF/GDC复合材料中实现了三维渗流网络，而在Ni/GDC复合材料中观察到二维渗流网络。这种差异与复合薄膜的微观结构有关。Ni/GDC呈现出各向异性的柱状结构,而LSCF/GDC则实现了各向同性结构。
