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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Effect of starting solution concentration in spray pyrolysis on powder properties and electrochemical electrode performance
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Effect of starting solution concentration in spray pyrolysis on powder properties and electrochemical electrode performance

机译：喷雾热解中起始溶液浓度对粉末性质和电化学电极性能的影响

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摘要

Nano-composite powders consisting of Sr-doped SmCoO3 (SSC) and Sm-doped CeO2 (SDC) were synthesized by spray pyrolysis using different cation concentration solutions, and the effect of this cation concentration on the electrochemical performance of electrodes fabricated using the powders was investigated. Regardless of the cation concentration, spherical particles consisting of nano-order fine SSC and SDC crystallites were successfully obtained. Although the crystal size of all the synthesized powders was almost the same, the particle size increased with increasing cation concentration. The microstructure of the cathodes fabricated using the nano-composite powders clearly depended on the particle size of the starting powders; the microstructure became coarser with increasing particle size and the original particle shapes partially remained in the cathode network. Also, electrochemical measurements for solid oxide fuel cells with these cathodes revealed that the electrode performance was related to the microstructure. The electrode polarization resistance decreased with decreasing particle size, and a relatively fine microstructure cathode exhibited lower electrode polarization resistance, resulting in a high performance of 1.52 W cm (2) at 700 degrees C. These results indicate that controlling the particle size, as well as controlling the nanostructure within the particles, is crucial to attain high performance electrodes. (C) 2016 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
机译：使用不同的阳离子浓度溶液通过喷雾热解合成了由掺Sr的SmCoO3（SSC）和掺Sm的CeO2（SDC）组成的纳米复合粉末，该阳离子浓度对使用该粉末制备的电极的电化学性能的影响为调查。无论阳离子浓度如何，都成功获得了由纳米级SSC和SDC微晶组成的球形颗粒。尽管所有合成粉末的晶体尺寸几乎相同，但随着阳离子浓度的增加，粒径增加。使用纳米复合粉末制造的阴极的微观结构显然取决于起始粉末的粒径;因此，阴极的微观结构取决于初始粉末的粒度。随着粒度的增加，微观结构变得更粗糙，原始颗粒的形状部分保留在阴极网络中。而且，对具有这些阴极的固体氧化物燃料电池的电化学测量表明，电极性能与微观结构有关。电极极化电阻随粒径减小而降低，并且相对精细的微结构阴极表现出较低的电极极化电阻，从而在700摄氏度下具有1.52 W cm（2）的高性能。这些结果表明，控制粒径也同样控制颗粒内的纳米结构，对于获得高性能电极至关重要。 （C）2016日本粉末技术学会。由Elsevier B.V.和日本粉末技术学会出版。版权所有。

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