陶瓷
阴极
材料科学
燃料电池
化学工程
光电子学
复合材料
化学
物理化学
工程类
作者
Yanru Yin,Бо Лю,Dong Yan,Jian Li,Lichao Jia
出处
期刊:SusMat
[Wiley]
日期:2024-08-27
摘要
Abstract The cathode performance significantly impacts the overall performance of protonic ceramic fuel cells (PCFCs). Many properties of the material, such as oxygen vacancies, protonation, charge carrier transport abilities, and surface oxygen reduction reaction activity, can affect cathode performance. However, which parameter has more weight is still being debated. In this work, we use Ba 0.5 Sr 0.5 Zr 0.25 Fe 0.65 X 0.1 O 3 as a case study (X = Zn, Cu, Mn, Ni, and Co). First‐principle calculations and experimental research are used to study and compare the critical parameters that determine cathode performance. It is discovered that no dopant can improve all the properties of the material. Balancing distinct intrinsic properties is a viable and rational approach. The more balanced, the better performance. When compared to other dopants, nickel dopant is shown to be the most effective in the Ba 0.5 Sr 0.5 Zr 0.25 Fe 0.65 X 0.1 O 3 material system, allowing a high fuel cell performances of 1862, 1450, and 1085 mW cm −2 at 700°C, 650°C, and 600°C, with a low polarization resistance of 0.041 Ω cm 2 at 700°C, which is higher than the majority of cobalt‐free cathodes for PCFCs. The current study not only presents a promising cathode candidate, but more importantly, also an effective and fundamental methodology to design cathodes for PCFCs.
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