The electrochemical behavior of the LaSrCuO4 − δ/Ce0.9Gd0.1O2 − δ interface

被引：0
|
作者：
N. V. Lyskov
L. S. Leonova
G. N. Mazo
机构：
[1] Russian Academy of Sciences,Institute of Problems of Chemical Physics
[2] Moscow State University,Faculty of Chemistry
来源：
Russian Journal of Electrochemistry | 2011年 / 47卷
关键词：
lanthanum-strontium cuprates; screen printing technology; electrode/electrolyte interface; impedance spectroscopy; cathodic material; SOFC;
D O I：
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摘要：
The electrochemical behavior of the LaSrCuO4 − δ/Ce0.9Gd0.1O2 − δ interface is studied by impedance spectroscopy and cyclic voltammetry methods. By analyzing the dependence of the impedance frequency spectra on the oxygen partial pressure, the rate-determining stages of oxygen exchange are determined in the temperature interval of 500–900°C. For temperatures above 700°C, the adsorption of oxygen molecules and their dissociation to oxygen atoms are shown to make a substantial contribution to the polarization resistance of the overall electrode process, besides the charge-transfer resistance.
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