首页|A-site Ca-doped layered double perovskite Pr1-xCaxBa0.94Co2O5+δ as high-performance and stable cathode for intermediate-temperature solid oxide fuel cells
A-site Ca-doped layered double perovskite Pr1-xCaxBa0.94Co2O5+δ as high-performance and stable cathode for intermediate-temperature solid oxide fuel cells
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
? 2022 Elsevier B.V.Developing highly active and stable air electrode is crucial to large-scale commercialization of intermediate-temperature solid oxide fuel cells (IT-SOFCs). Herein we report A-site Ca-doped layered double perovskites, Pr1-xCaxBa0.94Co2O5+δ (PCxB0.94C, x = 0.1–0.3), as a family of promising cathode materials for catalyzing the oxygen reduction oxygen (ORR). Benefiting from enhanced electrical conductivity and promoted surface oxygen exchange/chemical diffusion rates, Pr1-xCaxBa0.94Co2O5+δ demonstrates an efficient ORR activity in intermediate-temperature region. The electrochemical performance of the samples is characterized by symmetrical half-cells and button fuel cells. Among all these compositions, Pr0.8Ca0.3Ba0.94Co2O5+δ (PC0.3B0.94C) exhibits the lowest polarization resistance (Rp) of 0.027 Ω cm2 at 700 °C. The peak power density (PPD) of 1114 mW cm-2 is achieved in the PC0.3B0.94C cathode-based button fuel cell at 700 °C, along with outstanding stability over a period of 130 h. The findings endow the potential utilization of the PC0.3B0.94C cathode for IT-SOFCs under the realistic conditions.
Key Laboratory of Superlight Material and Surface Technology Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University
Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education School of Chemistry Chemical Engineering and Materials Heilongjiang University
NSTL
Elsevier
