TY - JOUR

T1 - Development of composite LaNi0·6Fe0.4O3-δ-based air electrodes for solid oxide fuel cells with a thin-film bilayer electrolyte

AU - Pikalova, E.

AU - Bogdanovich, N.

AU - Kolchugin, A.

AU - Shubin, K.

AU - Ermakova, L.

AU - Eremeev, N.

AU - Farlenkov, A.

AU - Khrustov, A.

AU - Filonova, E.

AU - Sadykov, V.

N1 - Funding Information: The study of the electrodes was financially supported by the Russian Foundation for Basic Research , grant № 20-03-00151 . Materials characterization was made using the shared access center “Composition of compounds” equipment. BIC support by 0239–2021-0011 budget project is acknowledged as well. Publisher Copyright: © 2021 Hydrogen Energy Publications LLC Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/5/10

Y1 - 2021/5/10

N2 - In this study the bilayer composite electrodes based on LaNi0.6Fe0.4O3-δ (LNF) electronic conductor and Bi2O3-based electrolytes doped with Er (Bi1.6Er0.4O3, EDB) and Y (Bi1.5Y0.5O3, YDB) have been developed and their performance has been investigated in the dependence on the electrolyte content and sintering conditions. The polarization resistance of the optimized electrodes with electrolyte content of 50 wt % in the functional layer and with the LNF-EDB-CuO collector is in a range of 0.65–1.09 Ω cm2 at 600 °C and 0.10–0.12 Ω cm2 at 700 °C. The polarization characteristics of the Bi-based electrodes are compared with those for the composite electrodes based on LNF and Ce0.8Sm0.2O1.9 (SDC). The developed electrodes have been tested in a SOFC mode in the anode-supported cells with a thin film electrolyte of YSZ/YDC (Y-doped zirconia/ceria). The single cells with such cathodes are shown to have performance characteristics that are several times higher than that for the cell with a standard platinum cathode. This is due to the optimized content and dispersity of the components; high conductivity of ionic and electronic constituents of the composite electrodes; greatly extended triple phase boundary (TPB) of the electrochemical reaction and advanced electrode design with collector providing uniform current distribution.

AB - In this study the bilayer composite electrodes based on LaNi0.6Fe0.4O3-δ (LNF) electronic conductor and Bi2O3-based electrolytes doped with Er (Bi1.6Er0.4O3, EDB) and Y (Bi1.5Y0.5O3, YDB) have been developed and their performance has been investigated in the dependence on the electrolyte content and sintering conditions. The polarization resistance of the optimized electrodes with electrolyte content of 50 wt % in the functional layer and with the LNF-EDB-CuO collector is in a range of 0.65–1.09 Ω cm2 at 600 °C and 0.10–0.12 Ω cm2 at 700 °C. The polarization characteristics of the Bi-based electrodes are compared with those for the composite electrodes based on LNF and Ce0.8Sm0.2O1.9 (SDC). The developed electrodes have been tested in a SOFC mode in the anode-supported cells with a thin film electrolyte of YSZ/YDC (Y-doped zirconia/ceria). The single cells with such cathodes are shown to have performance characteristics that are several times higher than that for the cell with a standard platinum cathode. This is due to the optimized content and dispersity of the components; high conductivity of ionic and electronic constituents of the composite electrodes; greatly extended triple phase boundary (TPB) of the electrochemical reaction and advanced electrode design with collector providing uniform current distribution.

KW - Collector

KW - Doped BiO

KW - LaNi.Fe.O

KW - Polarization resistance

KW - SOFC cathode

KW - SOFC performance

UR - http://www.scopus.com/inward/record.url?scp=85103407461&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2021.02.217

DO - 10.1016/j.ijhydene.2021.02.217

M3 - Article

AN - SCOPUS:85103407461

VL - 46

SP - 16947

EP - 16964

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 32

ER -