TY - JOUR
T1 - Towards high performance durable ceramic fuel cells using a triple conducting perovskite cathode
AU - Liu, Zhipeng
AU - Xie, Heping
AU - Zhang, Yuan
AU - Li, Junbiao
AU - Zhu, Haojie
AU - Ni, Meng
AU - Shao, Zongping
AU - Chen, Bin
N1 - Publisher Copyright:
© 2024
PY - 2024/6/5
Y1 - 2024/6/5
N2 - To guarantee the efficient and durable operation of oxygen ion/proton-conducting ceramic fuel cells, the cathode materials need to be versatile in terms of high activity, good CO2 resistance, and matched thermal expansion behavior with electrolyte, etc. In this study, we substituted 10% Nb to the B-site of parent perovskite-BaCo0.7Fe0.2Y0.1O3-δ, to form a single-phase material with triple conducting (H+/O2-/e-) capability as a highly ORR-active cathode. The doped BaCo0.6Fe0.2Y0.1Nb0.1O3-δ (BCFYN) shows promising ORR activity due to the optimized oxygen vacancy, improved hydration capacity, and accelerated charge transfer kinetics. The reduction of thermal expansion coefficient (TEC) and enhanced CO2 resistance also facilitate the cathode durability. As a result, the area-specific resistances of BCFYN electrode at 550 °C for oxygen-ion and proton conducting symmetrical cells were only 0.106 and 0.24 Ω cm2, respectively. These results indicate that BCFYN is a highly promising cathode material for both SOFCs and PCFCs.
AB - To guarantee the efficient and durable operation of oxygen ion/proton-conducting ceramic fuel cells, the cathode materials need to be versatile in terms of high activity, good CO2 resistance, and matched thermal expansion behavior with electrolyte, etc. In this study, we substituted 10% Nb to the B-site of parent perovskite-BaCo0.7Fe0.2Y0.1O3-δ, to form a single-phase material with triple conducting (H+/O2-/e-) capability as a highly ORR-active cathode. The doped BaCo0.6Fe0.2Y0.1Nb0.1O3-δ (BCFYN) shows promising ORR activity due to the optimized oxygen vacancy, improved hydration capacity, and accelerated charge transfer kinetics. The reduction of thermal expansion coefficient (TEC) and enhanced CO2 resistance also facilitate the cathode durability. As a result, the area-specific resistances of BCFYN electrode at 550 °C for oxygen-ion and proton conducting symmetrical cells were only 0.106 and 0.24 Ω cm2, respectively. These results indicate that BCFYN is a highly promising cathode material for both SOFCs and PCFCs.
KW - Cathode
KW - Nb doping
KW - Perovskite
KW - Proton conducting fuel cells
KW - Triple conducting
UR - http://www.scopus.com/inward/record.url?scp=85182889050&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2023.123678
DO - 10.1016/j.apcatb.2023.123678
M3 - Journal article
AN - SCOPUS:85182889050
SN - 0926-3373
VL - 346
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 123678
ER -