Solid oxide cells (SOCs) have recently gained attention as an efficient energy conversion system for a smart-grid that can resolve the intermittency of renewable energy. In particular, a symmetric configuration of the electrode has been developed to minimize fabrication cost and relieve compatibility issues. In this work, PSMFN (Pr_0.6Sr_0.4Mn_0.2Fe_0.7Ni_0.1O_3−δ) was developed and evaluated as a quasi-symmetric electrode for a solid oxide cell (Q-SSOC). A solid oxide cell fashioned with PSMFN–GDC (Ce_0.9Gd_0.1O₂) exhibited an electrochemical performance of 0.702 W cm⁻² for H₂-SOFC and 1.02 A cm⁻² at a voltage of 1.5 V for CO₂-SOEC at 800 °C. The physiochemical and electrochemical properties of PSMFN were investigated to elaborate this notable electrochemical performance of PSMFN–GDC. X-ray diffraction (XRD), microscopic analyses, and X-ray absorption near edge structure (XANES) indicated the occurrence of an exsolution of Fe–Ni alloy nanoparticles (NPs) along with a phase transition from the perovskite to the Ruddlesden–Popper structure. In addition, X-ray photoelectron spectroscopy (XPS) was utilized to elucidate the change in surface oxygen vacancies of the reduced PSMFN form. Furthermore, electrical conductivities and area specific resistances under an air atmosphere were measured to investigate the activities of PSMFN towards oxygen electrode reactions. From these analyses, PSMFN can provide numerous active sites both for electrode reactions with oxygen as well as fuel, which make it a promising quasi-symmetric electrode for an SOC.

中文翻译：

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多功能钙钛矿氧化物Pr0.6Sr0.4Mn0.2Fe0.7Ni0.1O3−δ作为固体氧化物燃料/电解电池的高效准对称电极

固体氧化物电池（SOC）作为智能电网的高效能源转换系统，可以解决可再生能源的间歇性问题，最近受到关注。特别是，已经开发了电极的对称配置，以最大限度地降低制造成本并缓解兼容性问题。在这项工作中，PSMFN（Pr _0.6 Sr _0.4 Mn _0.2 Fe _0.7 Ni _0.1 O _{3− δ}）被开发并评估为固体氧化物电池（Q-SSOC）的准对称电极。采用 PSMFN-GDC (Ce _0.9 Gd _0.1 O ₂ )制成的固体氧化物电池在 1.5 V 电压下，H ₂ -SOFC 的电化学性能为 0.702 W cm ^{-2 ，CO} ₂ -SOEC的电化学性能为 1.02 A cm ^{-2 。} 800℃。研究了 PSMFN 的物理化学和电化学性能，以阐述 PSMFN-GDC 的显着电化学性能。 X 射线衍射 (XRD)、显微分析和 X 射线吸收近边缘结构 (XANES) 表明出现了 Fe-Ni 合金纳米颗粒 (NP) 的溶出以及从钙钛矿到 Ruddlesden-Popper 的相变结构。此外，X射线光电子能谱（XPS）被用来阐明还原PSMFN形式的表面氧空位的变化。此外，还测量了空气气氛下的电导率和面积比电阻，以研究 PSMFN 对氧电极反应的活性。从这些分析来看，PSMFN 可以为与氧气和燃料的电极反应提供大量活性位点，这使其成为 SOC 的有前途的准对称电极。