平面SOFC阴极/电解质界面结构及电化学性能研究

M. Kuznecov, P. Otschik, K. Eichler, W. Schaffrath
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引用次数: 6

摘要

研究了丝网印刷的lau0.8 sr0.2 mno3阴极与ZrO2+8%Y2O3电解质之间形成的阴极/电解质界面的电化学行为。阴极/电解质界面阻抗计算为(I)阴极材料与大气之间的氧交换速度、(II)界面微观结构和(III)氧空位扩散系数的函数。计算的阻抗谱与实测的阻抗谱吻合得很好。讨论了阴极孔隙率对阻抗的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structure and Electrochemical Properties of the Cathode/Electrolyte Interface in the Planar SOFC

The electrochemical behaviour of the cathode/electrolyte interface which is formed between screen printed Lao0.8Sr0.2MNO3-cathode and ZrO2+8%Y2O3 electrolyte was investigated. The impedance of the cathode/electrolyte interface was calculated as a function of (I) the oxygen exchange velocity between cathode material and atmosphere, (II) interface microstructure and (III) the oxygen vacancies diffusion coefficient. A very good agreement between calculated and measured impedance spectra was achieved. The influence of the porosity of the cathode on the impedance is discussed.

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