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Preparation and Properties of PrBa0.5Sr0.5Co1.5Fe0.5O5+δ as Novel Oxygen Electrode for Solid Oxide Electrolysis Cells

Monday, 24 July 2017
Grand Ballroom East (The Diplomat Beach Resort)
Y. Tian (Huazhong University of Science and Technology), D. Yan (Huazhong University of Science & Technology), B. Chi (HUST-Huazhong University of Science and Technology), J. Chen (Henan University of Technology), X. Li (Huazhong University of Science & Technology), and J. Li (Huazhong University of Science and Technology)
A novel double perovskite oxide PrBa0.5Sr0.5Co1.5Fe0.5O5+δ (PBSCF) was prepared by a sol–gel method and then characterized by X-ray diffraction. The pure PBSCF as oxygen electrode for solid oxide electrolysis cells (SOECs). Electrochemical impedance spectra and voltage-current curves of the electrolysis cell with the configuration of PBSCF/GDC/YSZ/Ni-YSZ were measured as a function of operating temperature and steam concentration to characterize the electrolysis cell performances. The current density increased from 1.445 A/cm2 at 700to 1.735 A/cm2 at 800with 90vol% absolute humidity (AH) under an applied electrolysis voltage of 2V, The polarization resistance was 0.13Ω/cm2 at 800with 90% absolute humidity (AH). The hydrogen generation rate of the cell can be up to 978 mL/(cm2⸳h) with 90vol% AH at 800calculated from the Faraday’s law. Further, the electrolysis cell has showed very stable performance during a120 h short-term electrolysis testing, indicating that PBSCF can be a very promising candidate material for the oxygen electrode of SOECs.