The traditional PrSrFeO (PSF) cathode is customized with Mn cations to generate the new PrSrFeMnO (PSFMn) cathode for proton-conducting solid oxide fuel cells (H-SOFCs). Compared to the PSF oxide, the new PSFMn has a reduced thermal expansion, making it more compatible with electrolytes. Furthermore, Mn-doping enhances oxygen vacancy production in PSF, as revealed by experimental and first-principle calculations. More crucially, doping Mn into PSF improves proton diffusion kinetics, resulting in quicker proton diffusion and surface exchange. As a result, the H-SOFC with the PSFMn cathode achieves an output of 1446 mW cm at 700 °C, but the PSF cell only achieves fuel cell performance of 1009 mW cm. The fundamental cause of the increased cell performance is the significantly reduced polarization resistance, implying that using the Mn-doping strategy enhances the cathode kinetics of conventional PSF cathodes for H-SOFC.

中文翻译：

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用Mn阳离子定制Pr0.5Sr0.5FeO3氧化物作为质子传导固体氧化物燃料电池的阴极

传统的 PrSrFeO (PSF) 阴极采用 Mn 阳离子定制，生成用于质子传导固体氧化物燃料电池 (H-SOFC) 的新型 PrSrFeMnO (PSFMn) 阴极。与PSF氧化物相比，新型PSFMn的热膨胀降低，使其与电解质更相容。此外，实验和第一原理计算表明，Mn 掺杂可增强 PSF 中氧空位的产生。更重要的是，将 Mn 掺杂到 PSF 中可以改善质子扩散动力学，从而实现更快的质子扩散和表面交换。结果，具有PSFMn阴极的H-SOFC在700℃下实现了1446 mW cm的输出，但PSF电池仅实现了1009 mW cm的燃料电池性能。电池性能提高的根本原因是极化电阻显着降低，这意味着使用Mn掺杂策略增强了H-SOFC传统PSF阴极的阴极动力学。