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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Preparation and characterization of Ni-YSZ composite electrode for solid oxide fuel cells by different co-precipitation routes
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Preparation and characterization of Ni-YSZ composite electrode for solid oxide fuel cells by different co-precipitation routes

机译：不同共沉淀途径制备固体氧化物燃料电池Ni-YSZ复合电极及其表征

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摘要

In this study, two synthetic routes were used to prepare NiO-YSZ nanocomposite particles. The first one is an improved co-precipitation route, in which NiO-YSZ nanocomposite particles were synthesized by adding a nickel/yttrium nitrate solution to an organic base solution containing an anionic zirconium carbonate complex. The second one is the conventional co-precipitation method. The homogeneity and sinteractivity of the synthesized NiO/YSZ composite particles, as well as the subsequent microstructure and electrochemical performance of the resultant Ni-YSZ anode for the two synthetic routes were evaluated and compared in detail. The results show that the particles synthesized by the conventional co-precipitation route involved aggregated composites with a non-uniform distribution of NiO and YSZ phases. The particles showed poor sinteractivity, a coarse and inhomogeneous anode microstructure, and a moderate area-specific resistance (ASR) of 0.35 Omega cm(2) at 800 degrees C under open circuit voltage (OCV). In contrast, homogeneous nanocomposite particles were successfully synthesized by the improved co-precipitation route. The particles showed better sinteractivity, a fine and uniform porous microstructure with a grain size in the range of 200-400 nm even at the sintering temperature of 1300 degrees C, and a low ASR of 0.16 Omega cm(2) at 800 degrees C under OCV. (C) 2016 Elsevier B.V. All rights reserved.
机译：在这项研究中，使用两种合成途径制备了NiO-YSZ纳米复合颗粒。第一种是改进的共沉淀途径，其中通过将硝酸镍/钇钇溶液添加到含有阴离子碳酸锆络合物的有机碱溶液中来合成NiO-YSZ纳米复合颗粒。第二种是常规的共沉淀法。评估并比较了合成的NiO / YSZ复合颗粒的均质性和烧结活性，以及​​随后得到的Ni-YSZ阳极在两种合成途径下的微观结构和电化学性能。结果表明，通过常规的共沉淀途径合成的颗粒包括NiO和YSZ相分布不均匀的聚集复合物。颗粒在800摄氏度的开路电压（OCV）下显示出较差的烧结性，粗糙且不均匀的阳极微观结构以及0.35Ωcm（2）的中等面积比电阻（ASR）。相反，通过改进的共沉淀途径成功地合成了均匀的纳米复合颗粒。颗粒表现出更好的烧结活性，即使在1300摄氏度的烧结温度下，晶粒尺寸仍在200-400 nm范围内，具有精细而均匀的多孔微结构，在800摄氏度下的ASR为0.16 Omega cm（2）低OCV。 （C）2016 Elsevier B.V.保留所有权利。

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