TY - JOUR

T1 - Mo-doped BaCe0·9Y0·1O3-δ proton-conducting electrolyte at intermediate temperature SOFCs. Part I: Microstructure and electrochemical properties

AU - Hanif, Muhammad

AU - Rauf, Sajid

AU - Mosiałek, Michał

AU - Khan, Kashif

AU - Kavaliukė, Vilma

AU - Kežionis, Algimantas

AU - Šalkus, Tomas

AU - Gurgul, Jacek

AU - Medvedev, Dmitry

AU - Zimowska, Małgorzata

AU - Madej, Dominika

AU - Motola, Martin

N1 - This study was supported by the Operation Program of Integrated Infrastructure for the project, UpScale of Comenius University Capacities and Competence in Research, Development and Innovation , ITMS2014+ : 313021BUZ3 , co-financed by the European Regional Development Fund. National Natural Science Foundation of China (Grant No. 32250410309 ).

PY - 2023/12/1

Y1 - 2023/12/1

N2 - Researchers' interest in proton-conducting reversible solid oxide cells (RSOCs) is growing due to their distinct benefits. In the present work, single-phase BaCe0.9–xMoxY0.1O3–δ (x = 0, 0.025, 0.05, 0.1, 0.2) electrolyte is prepared via sol-gel method and sintered at 1400 °C for 10 h. Optimal density, structure, composition, electrochemical performance, and thermal stability are confirmed via SEM, XRD, EDS, XPS, FTIR, EIS, and TGA/DSC. The conductivity of the grain interior and boundaries between 127 and 727 °C is reported for the first time in SOFC studies. The BaCe0·875Mo0·025Y0·1O3–δ sample shows a grain interior conductivity of 1.3 × 10−3 S cm−1 at 707 °C with grain interior activation energy of 0.75 eV (127–727 °C), and a grain boundary activation energy of 0.85 eV (380–727 °C), 0.43 eV (167–357 °C) in air atmosphere, respectively. BaCe0.875Mo0.025Y0.1O3–δ showed extreme stability for 300 h, and thus can be considered suitable for an efficient protonic conductor at intermediate temperatures.

AB - Researchers' interest in proton-conducting reversible solid oxide cells (RSOCs) is growing due to their distinct benefits. In the present work, single-phase BaCe0.9–xMoxY0.1O3–δ (x = 0, 0.025, 0.05, 0.1, 0.2) electrolyte is prepared via sol-gel method and sintered at 1400 °C for 10 h. Optimal density, structure, composition, electrochemical performance, and thermal stability are confirmed via SEM, XRD, EDS, XPS, FTIR, EIS, and TGA/DSC. The conductivity of the grain interior and boundaries between 127 and 727 °C is reported for the first time in SOFC studies. The BaCe0·875Mo0·025Y0·1O3–δ sample shows a grain interior conductivity of 1.3 × 10−3 S cm−1 at 707 °C with grain interior activation energy of 0.75 eV (127–727 °C), and a grain boundary activation energy of 0.85 eV (380–727 °C), 0.43 eV (167–357 °C) in air atmosphere, respectively. BaCe0.875Mo0.025Y0.1O3–δ showed extreme stability for 300 h, and thus can be considered suitable for an efficient protonic conductor at intermediate temperatures.

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U2 - 10.1016/j.ijhydene.2023.01.144

DO - 10.1016/j.ijhydene.2023.01.144

M3 - Article

VL - 48

SP - 37532

EP - 37549

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 96

ER -