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首页> 外文会议>International symposium on solid oxide fuel cells;SOFC-XII >La_(0.4)Sr_(0.6)Co_(0.8)Fe_(0.2)O_(3-δ) / Ce_(0.9)Gd_(0.1)O_(2-δ) Interface: Characterization by High Resolution SEM and TEM
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La_(0.4)Sr_(0.6)Co_(0.8)Fe_(0.2)O_(3-δ) / Ce_(0.9)Gd_(0.1)O_(2-δ) Interface: Characterization by High Resolution SEM and TEM

机译：La_（0.4）Sr_（0.6）Co_（0.8）Fe_（0.2）O_（3-δ）/ Ce_（0.9）Gd_（0.1）O_（2-δ）界面：高分辨率SEM和TEM表征

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摘要

In this work, we successfully applied a FIB/lift-out technique to prepare site-specific thin samples containing the cathode/ electrolyte interface between two La_(0.4)Sr_(0.6)Co_(0.8)Fe_(0.2)O_(3-δ) (LSCF) / Ce_(0.9)Gd_(0.1)O_(2-δ)(CGO) half cells. Despite different cathode thicknesses (15 μm and a 5 μm), both samples presented similar composition and nano-sized structure. However, an exhaustive microscopic analysis by SEM and TEM in high resolution modes revealed that the 15 μm sample presented a perfectly attached interface, while the other showed pores at the interfacial boundary, decreasing the real LSCF/CGO contact and increasing the area specific resistance. The presented combined techniques are a powerful tool to investigate subtle microstructural changes that may occur in the electrolyte/electrode interface and are adequate for studying changes after long term operation conditions.
机译：在这项工作中，我们成功地应用了FIB /提拉技术制备了特定位置的稀薄样品，该样品包含两个La_（0.4）Sr_（0.6）Co_（0.8）Fe_（0.2）O_（3-δ）之间的阴极/电解质界面）（LSCF）/ Ce_（0.9）Gd_（0.1）O_（2-δ）（CGO）半电池。尽管阴极厚度不同（分别为15μm和5μm），但两个样品都具有相似的组成和纳米尺寸的结构。然而，在高分辨率模式下通过SEM和TEM进行的详尽显微镜分析显示，15μm样品呈现出完美附着的界面，而另一个在界面边界处显示孔洞，从而降低了LSCF / CGO的实际接触并增加了面积比电阻。提出的组合技术是研究可能在电解质/电极界面中发生的微细微结构变化的强大工具，并且足以研究长期运行条件后的变化。

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