Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Functional properties of La1–xBaxFeO3–δ as symmetrical electrodes for protonic ceramic electrochemical cells
AU - Gordeeva, Maria A.
AU - Tarutin, Artem P.
AU - Starostin, George N.
AU - Vdovin, Gennady K.
AU - Medvedev, Dmitry A.
N1 - This work was prepared within the framework of the budgetary plans of the Ural Federal University and Institute of High Temperature Electrochemistry with the facilities of the Shared Access Center “Composition of Compounds” with no external financing/grant programs.
PY - 2023
Y1 - 2023
N2 - To create highly efficient solid oxide fuel cells with a symmetrical configuration, it is necessary to develop suitable functional materials whose properties under oxidizing and reducing conditions will satisfy simultaneously the requirements for both fuel and oxygen electrodes. In the present work, the La1–xBaxFeO3–δ (x = 0.4, 0.5, 0.6) materials were obtained and investigated as symmetrical electrodes for proton-conducting electrochemical cells based on a BaCe0.7Zr0.1Y0.1Yb0.1O3–δ electrolyte. For the first time, the La1–xBaxFeO3–δ materials were comprehensively investigated in terms of electrical conductivity, thermomechanical and electrochemical properties in both oxidizing and reducing atmospheres. It is found experimentally that La0.6Ba0.4FeO3–δ demonstrates the highest electrical conductivity, lowest polarization resistances and acceptable thermal expansion behavior, which allows these materials to be used as oxygen electrodes. However, for the successful utilization of the La1–xBaxFeO3–δ as the symmetrical electrodes, their transport properties under reducing atmospheres need to be improved. © 2023 Elsevier Ltd
AB - To create highly efficient solid oxide fuel cells with a symmetrical configuration, it is necessary to develop suitable functional materials whose properties under oxidizing and reducing conditions will satisfy simultaneously the requirements for both fuel and oxygen electrodes. In the present work, the La1–xBaxFeO3–δ (x = 0.4, 0.5, 0.6) materials were obtained and investigated as symmetrical electrodes for proton-conducting electrochemical cells based on a BaCe0.7Zr0.1Y0.1Yb0.1O3–δ electrolyte. For the first time, the La1–xBaxFeO3–δ materials were comprehensively investigated in terms of electrical conductivity, thermomechanical and electrochemical properties in both oxidizing and reducing atmospheres. It is found experimentally that La0.6Ba0.4FeO3–δ demonstrates the highest electrical conductivity, lowest polarization resistances and acceptable thermal expansion behavior, which allows these materials to be used as oxygen electrodes. However, for the successful utilization of the La1–xBaxFeO3–δ as the symmetrical electrodes, their transport properties under reducing atmospheres need to be improved. © 2023 Elsevier Ltd
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U2 - 10.1016/j.jeurceramsoc.2023.07.018
DO - 10.1016/j.jeurceramsoc.2023.07.018
M3 - Article
VL - 43
SP - 6946
EP - 6955
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 15
ER -
ID: 43605615