TY - GEN
T1 - Polarization Resistance of Ceria-Containing Fuel Electrodes in Solid Oxide Cells Studied by Impedance and DRT Analysis
AU - Endo, Naoki
AU - Fukumoto, Takuro
AU - Tachikawa, Yuya
AU - Lyth, Stephen Matthew
AU - Matsuda, Junko
AU - Sasaki, Kazunari
N1 - Funding Information:
A part of this study was supported by “Research and Development Program for Promoting Innovative Clean Energy Technologies Through International Collaboration” of the New Energy and Industrial Technology Development Organization (NEDO) (Contract No.20001460-0). Collaborative support by Prof. H. L. Tuller, Prof. B. Yildiz, and Prof. J. L. M. Rupp at Massachusetts Institute of Technology (MIT) is gratefully acknowledged.
Publisher Copyright:
© 2022 ECS-The Electrochemical Society.
PY - 2022
Y1 - 2022
N2 - Solid oxide electrolysis cells (SOECs) can be used to perform steam electrolysis in a process which is the reverse of power generation using a solid oxide fuel cell (SOFCs). They are capable of highly efficient hydrogen production. In this study, various model fuel electrode materials were compared and evaluated over a wide range of current densities in both SOFC and SOEC modes. Here, we prepared three types of cells: (i) with a conventional Ni-scandia-stabilized-zirconia (Ni-ScSZ) cermet fuel electrode, (ii) with a Ni-gadolinia-doped ceria (Gd0.1Ce0.9O2, Ni-GDC) cermet fuel electrode, and (iii) with a Ni-GDC co-impregnated fuel electrode fabricated by the co-impregnation method. The electrode reactions are characterized through measurements of electrochemical impedance spectra (EIS) and subsequent analysis of distribution of relaxation times (DRT). The results suggest that the use of mixed ionic and electronic conductor GDC as a fuel electrode material is advantageous especially in SOEC operation mode.
AB - Solid oxide electrolysis cells (SOECs) can be used to perform steam electrolysis in a process which is the reverse of power generation using a solid oxide fuel cell (SOFCs). They are capable of highly efficient hydrogen production. In this study, various model fuel electrode materials were compared and evaluated over a wide range of current densities in both SOFC and SOEC modes. Here, we prepared three types of cells: (i) with a conventional Ni-scandia-stabilized-zirconia (Ni-ScSZ) cermet fuel electrode, (ii) with a Ni-gadolinia-doped ceria (Gd0.1Ce0.9O2, Ni-GDC) cermet fuel electrode, and (iii) with a Ni-GDC co-impregnated fuel electrode fabricated by the co-impregnation method. The electrode reactions are characterized through measurements of electrochemical impedance spectra (EIS) and subsequent analysis of distribution of relaxation times (DRT). The results suggest that the use of mixed ionic and electronic conductor GDC as a fuel electrode material is advantageous especially in SOEC operation mode.
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U2 - 10.1149/10911.0003ecst
DO - 10.1149/10911.0003ecst
M3 - Conference contribution
AN - SCOPUS:85140783801
T3 - ECS Transactions
SP - 3
EP - 13
BT - ECS Transactions
PB - Institute of Physics Publishing
T2 - 242nd ECS Meeting
Y2 - 9 October 2022 through 13 October 2022
ER -
