Electrochemical characterization of mixed conducting and composite SOFC cathodes |
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| Institution: | 1. College of Equipment Manufacture, Hebei University of Engineering, Handan 056038, China;2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China |
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| Abstract: | The electrochemical performance of La0.58Sr0.4Co0.2Fe0.8O3−δ (L58SCF), La0.9Sr1.1FeO4−δ (LS2F) and LSM (La0.65Sr0.3MnO3−δ)/LSM–YSZ (50 wt.% LSM–50 wt.% ZrO2 (8 mol% Y2O3)) cathode electrodes interfaced to a double layer Ce0.8Gd0.2O2−δ (CGO)/YSZ electrolyte was studied in the temperature range of 600 to 850 °C and under flow of 21% O2/He mixture, using impedance spectroscopy and current density–overpotential measurements. The L58SCF cathode exhibited the highest electrocatalytic activity for oxygen reduction, according to the order: LS2F/CGO/YSZ ≤ LSM/LSM–YSZ/CGO/YSZ < L58SCF/CGO/YSZ. |
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