TY - JOUR

T1 - PrBaFe2O6-δ-based composites as promising electrode materials for protonic ceramic electrochemical cells

AU - Matkin, Danil

AU - Gordeeva, Maria

AU - Tarutin, Artem

AU - Medvedev, Dmitry

N1 - This work was prepared within the framework of the budgetary plans of the Hydrogen Energy Laboratory (Ural Federal University) and Institute of High Temperature Electrochemistry (IHTE) with the facilities of the IHTE Shared Access Center “Composition of Compounds”. The authors acknowledge St. Petersburg State University for research grant (Pure ID 91696387) and the Centre of X-ray Diffraction Studies.

PY - 2024

Y1 - 2024

N2 - PrBaFe2O6–δ (PBF) is considered as a promising material for mixed ionic-electronic conductors used in high-temperature applications. In the present work, PBF was used as a basis for two chemical modification approaches, including doping with cobalt, nickel and copper, as well as composite design with the addition of a BaCe0.8Sm0.2O3–δ phase. The single-phase and composite materials were successfully prepared and characterized in terms of their functional properties. The two approaches were found to synergistically affect the functional properties of PBF, allowing a trade-off between thermomechanical and transport properties to be achieved. As a result, the prepared 70 wt% PrBaFe1.9M0.1O6–δ (M = Co, Ni, Cu) + 30 wt% BaCe0.8Sm0.2O3–δ composites exhibit acceptable electrochemical activity in the intermediate-temperature range. The best electrochemical activity was found for the sample with M = Cu, whose polarization resistance at 700 °C reaches 1.7 Ω cm2. Therefore, the designed PBF-based composites can be considered as promising electrode materials for solid oxide fuel cell applications. © 2024 Elsevier Ltd.

AB - PrBaFe2O6–δ (PBF) is considered as a promising material for mixed ionic-electronic conductors used in high-temperature applications. In the present work, PBF was used as a basis for two chemical modification approaches, including doping with cobalt, nickel and copper, as well as composite design with the addition of a BaCe0.8Sm0.2O3–δ phase. The single-phase and composite materials were successfully prepared and characterized in terms of their functional properties. The two approaches were found to synergistically affect the functional properties of PBF, allowing a trade-off between thermomechanical and transport properties to be achieved. As a result, the prepared 70 wt% PrBaFe1.9M0.1O6–δ (M = Co, Ni, Cu) + 30 wt% BaCe0.8Sm0.2O3–δ composites exhibit acceptable electrochemical activity in the intermediate-temperature range. The best electrochemical activity was found for the sample with M = Cu, whose polarization resistance at 700 °C reaches 1.7 Ω cm2. Therefore, the designed PBF-based composites can be considered as promising electrode materials for solid oxide fuel cell applications. © 2024 Elsevier Ltd.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85188611652

U2 - 10.1016/j.jeurceramsoc.2024.03.052

DO - 10.1016/j.jeurceramsoc.2024.03.052

M3 - Article

VL - 44

SP - 5782

EP - 5793

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 10

ER -