Electrochemical devices such as solid oxide fuel cells (SOFC) may greatly benefit from the implementation of nanoengineered thin-film multifunctional layers providing, alongside enhanced electrochemical activity, improved mechanical and long-term stability. In this study, an ultrathin (400 nm) bilayer of samarium-doped ceria and a self-assembled nanocomposite made of Sm_0.2Ce_0.8O_1.9-La_0.8Sr_0.2MnO_3-δ was fabricated by pulsed laser deposition and is employed as a functional oxygen electrode in an anode-supported solid oxide fuel cell. Introducing the functional bilayer in the cell's architecture results in a simple processing technique for the fabrication of high-performance fuel cells (power density 1.0 W cm⁻² at 0.7 V and 750 °C). Durability tests were carried out for up to 1500 h, showing a small degradation under extreme operating conditions of 1 A cm⁻², while a stable behaviour at 0.5 A cm⁻² (2.8% V_in kh⁻¹). Post-test analyses, including scanning and transmission electron microscopy and electrochemical impedance spectroscopy, demonstrate that the nanoengineered thin film layers remain mostly morphologically stable after the operation.

中文翻译：

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作为阴极/电解质中间层的功能性薄膜：提高固体氧化物燃料电池性能和耐久性的策略

诸如固体氧化物燃料电池（SOFC）之类的电化学装置可以极大地受益于纳米工程薄膜多功能层的实施，除了增强的电化学活性之外，还提供了改善的机械和长期稳定性。_{在这项研究中，钐掺杂二氧化铈的超薄（400 nm）双层和由 Sm 0.2} Ce _0.8 O _1.9 -La _0.8 Sr _0.2 MnO _3-δ制成的自组装纳米复合材料通过脉冲激光沉积制造，并在阳极支撑的固体氧化物燃料电池中用作功能性氧电极。在电池结构中引入功能性双层可实现用于制造高性能燃料电池的简单加工技术（0.7 V 和 750 °C 时的功率密度为 1.0 W cm ^{-2 ）。}进行了长达 1500 小时的耐久性测试，在 1 A cm ^-2的极端工作条件下表现出小幅退化，而在 0.5 A cm ^-2下表现稳定（2.8% V _in kh ^-1）。包括扫描和透射电子显微镜和电化学阻抗谱在内的测试后分析表明，纳米工程薄膜层在操作后基本保持形态稳定。