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- W4205737429 abstract "In this study, a composite oxygen electrode is prepared by infiltrating a protonic-electronic conducting material, Ba 0.5 Gd 0.8 La 0.7 Co 2 O 6− δ (BGLC) into a proton-conducting BaZr 0.8 Y 0.2 O 3− δ (BZY20) backbone. The composite oxygen electrode is studied in a symmetrical cell configuration (BGLC-BZY20//BZY20//BGLC-BZY20). The electrode and cell performance are characterized via electrochemical impedance spectroscopy (EIS) with varying the operating conditions, including temperatures, oxygen, and steam partial pressures, with the purpose to identify and characterize the different electrochemical processes taking place in the oxygen electrode. Three electrode reaction processes are observed in the impedance spectra, which are tentatively assigned to i) diffusion of adsorbed oxygen/proton migration/hydroxyl formation, ii) oxygen reduction, and iii) charge transfer, going from the low- to high-frequency range. The BGLC-BZY20 electrode developed in this work shows a low polarization resistance of 0.22, 0.58, and 1.43 Ω cm 2 per single electrode in 3% humidified synthetic air (21% O 2 /79% N 2 ) at 600 °C, 550 °C, and 500 °C, respectively. During long-term measurement, the cell shows no degradation in the first 350 h but degrades afterward possibly due to insufficient material stability." @default.
- W4205737429 created "2022-01-25" @default.
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- W4205737429 date "2022-01-01" @default.
- W4205737429 modified "2023-10-17" @default.
- W4205737429 title "Ba<sub>0.5</sub>Gd<sub>0.8</sub>La<sub>0.7</sub>Co<sub>2</sub>O<sub>6−δ </sub> Infiltrated BaZr<sub>0.8</sub>Y<sub>0.2</sub>O<sub>3−δ </sub> Composite Oxygen Electrodes for Protonic Ceramic Cells" @default.
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- W4205737429 doi "https://doi.org/10.1149/1945-7111/ac4934" @default.
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