Sr and Mn co-doping PrBaFe2O5+δ optimizes the electrochemical performance and stability of solid oxide fuel cell cathode

被引：0
|
作者：
Song, Ru [1 ]
Guo, Dong [1 ]
Li, Aoye [1 ]
Liu, Yaowei [1 ]
Jin, Zhiyong [1 ]
Lu, Chunling [1 ]
Qiu, Dongchao [1 ]
Niu, Bingbing [1 ]
Wang, Biao [1 ]
机构：
[1] School of Science, University of Science and Technology Liaoning, Anshan,114051, China
来源：
Journal of Alloys and Compounds | 2024年 / 1005卷
基金：
中国国家自然科学基金;
关键词：
Cobalt - Crystal lattices - Electron spin resonance spectroscopy - Hydrogen bonds - Manganese alloys - Manganese compounds - Negative resistance - Praseodymium compounds - Semiconductor doping - Solar power generation - Strontium compounds;
D O I：
10.1016/j.jallcom.2024.176231
中图分类号：
学科分类号：
摘要：
Developing cobalt-free cathode with high stability and high electrochemical activity is very important for constructing low-cost, high-performance solid oxide fuel cells. Layered perovskite PrBaFe2O5+δ (PBF) is known to ave important magnetic, oxygen exchange kinetic and electrochemical properties. In this study, Sr and Mn co-doping A-site and B-site of PrBa0.5Sr0.5Fe1.6Mn0.4O5+δ (PBSFM) electrode was synthesized and characterized its properties. The first-principles calculation shows that Sr and Mn co-doped PBSFM decreases the oxygen vacancy energy, improves the overlap of oxygen-metal bond hybridization and structural stability. The polarization resistance (Rp) of PBSFM decreases from 0.22 to 0.077 Ω cm2 at 700 °C. At 800 °C, the power density of fuel cell reaches 674 mW cm−2 using hydrogen as fuel. In addition, Sr and Mn co-doped PBSFM significantly improves impedance and single cell stability under operating conditions. © 2024
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