A novel processing technique was developed to produce an in-situ nano-composite powder based on $$\hbox {La}_{0.6}\hbox {Sr}_{0.4}\hbox {Co}_{0.2} \hbox {Fe}_{0.8}\hbox {O}_{3\text {-}{\updelta }}$$ La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 - δ (LSCF6428) and $$\hbox {Gd}_{0.1}\hbox {Ce}_{0.9}\hbox {O}_{1.95}$$ Gd 0.1 Ce 0.9 O 1.95 (GDC10) for application as cathode material in intermediate temperature solid oxide fuel cells (IT-SOFC). The nano-composite powder was produced using glycine-nitrate solution combustion technique starting from nitrates of six metal ions. The synthesized powder was characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), particle size and BET surface area analyses. XRD analysis of as-produced nano-composite powder confirmed the formation of desired phases right after combustion synthesis. The structural parameters of different phases present in the powders were estimated through Rietveld refinement of XRD data. To compare the electrical properties of nano-composite cathode powder produced through the present method, nano-powders of GDC10 and LSCF6428 were individually produced through glycine nitrate process and subsequently mixed through solid-state technique and characterized for functional properties. Using this in-situ nano-composite material, lower polarization resistance was achieved as compared to the LSCF–GDC composite produced from mechanical mixtures of nano-powders of GDC10 and LSCF6428 when used as cathode in GDC10 electrolyte-based symmetrical cell. The effects of cathode layer thickness and electrode firing temperature on the cathodic polarization resistance were studied using in-situ nano-composite cathode powder.

中文翻译：

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工艺路线对IT-SOFC用LSCF基复合阴极性能的影响

开发了一种新的加工技术来生产基于 $$\hbox {La}_{0.6}\hbox {Sr}_{0.4}\hbox {Co}_{0.2} \hbox { 的原位纳米复合粉末Fe}_{0.8}\hbox {O}_{3\text {-}{\updelta }}$$ La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 - δ (LSCF6428) 和 $$\hbox {Gd}_ {0.1}\hbox {Ce}_{0.9}\hbox {O}_{1.95}$$ Gd 0.1 Ce 0.9 O 1.95 (GDC10) 用作中温固体氧化物燃料电池 (IT-SOFC) 的阴极材料。纳米复合粉末是使用甘氨酸 - 硝酸盐溶液燃烧技术从六种金属离子的硝酸盐开始生产的。合成的粉末使用 X 射线衍射 (XRD)、透射电子显微镜 (TEM)、粒度和 BET 表面积分析进行表征。所生产的纳米复合粉末的 XRD 分析证实了在燃烧合成后立即形成了所需的相。通过 XRD 数据的 Rietveld 精修估计粉末中存在的不同相的结构参数。为了比较通过本方法生产的纳米复合阴极粉末的电性能，通过甘氨酸硝酸工艺单独生产 GDC10 和 LSCF6428 纳米粉末，然后通过固态技术混合并表征功能特性。使用这种原位纳米复合材料，与由 GDC10 和 LSCF6428 纳米粉末的机械混合物生产的 LSCF-GDC 复合材料相比，当用作 GDC10 电解质基对称电池中的阴极时，实现了更低的极化电阻。使用原位纳米复合阴极粉末研究了阴极层厚度和电极烧制温度对阴极极化电阻的影响。