Characteristics of the porous Gd_0.15Sr_0.85CoO_3−δ and La_0.6Sr_0.4CoO_3−δ cathodes were compared using the data measured at different electrode potentials and oxygen partial pressures. The electrochemical high-temperature in situ XRD (HT-XRD) method combined with electrochemical impedance spectroscopy has been used. The response of the crystallographic parameters and impedance values on the changes of electrode potential has been discussed. Reversible changes of the lattice parameters for both cathodes, slower for Gd_0.15Sr_0.85CoO_3−δ compared with La_0.6Sr_0.4CoO_3−δ, were observed depending on temperature (T), electrode potential (E), and oxygen partial pressure (pO₂). The crystallographic parameters are determined by the vacancy formation kinetics as well as by vacancy formation energy in/at the cathode grain structure. Calculated impedance data were fitted to the experimental data and characteristics were obtained in context of crystallographic changes of the cathode materials studied.

中文翻译：

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GSC和LSC多孔电极晶体膨胀的比较研究

使用在不同电极电位和氧分压下测量的数据比较多孔Gd _0.15 Sr _0.85 CoO _3-δ和La _0.6 Sr _0.4 CoO _3-δ阴极的特性。已使用电化学高温原位 XRD (HT-XRD) 方法结合电化学阻抗谱。讨论了晶体学参数和阻抗值对电极电位变化的响应。两个阴极晶格参数的可逆变化，与 La _0.6 Sr _0.4相比，Gd _0.15 Sr _0.85 CoO _3-δ较慢观察到CoO _3-δ取决于温度 ( T )、电极电位 ( E ) 和氧分压 ( p O ₂ )。晶体学参数由空位形成动力学以及阴极晶粒结构中/处的空位形成能量决定。计算出的阻抗数据与实验数据相匹配，并且在所研究的阴极材料的晶体学变化的背景下获得了特性。