Imaging of Oxide Ionic Flows at Practical SOFC Cells by Isotope Labeling Technique

机译：同位素标记技术在实际SOFC细胞上的氧化物离子流成像

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Oxygen ionization and diffusion were visualized at the practical flatten tube SOFC stack/cells. Stable isotope oxygen (~(18)O) was applied to label the motion of oxygen/oxide ions with secondary ion mass spectrometry (SIMS) analysis. Surface reactivity and diffusivity of oxygen (oxide ions) were compared between the fuel cell operating condition and non-current flow conditions. A peak of ~(18)O-concentration was observed under fuel cell operating condition at the interlayer between cathode and electrolyte. This suggested that the active sites for ~(18)O ionization and diffusion were at the interlayer. Also, a slow ~(18)O diffusion layer can be formed at the interlayer/electrolyte interface because of the discontinuous ~(18)O distribution profiles.

机译：在实际的扁平管SOFC堆栈/电池上可以看到氧气的电离和扩散。应用稳定同位素氧（〜（18）O）通过二次离子质谱（SIMS）分析标记氧/氧化物离子的运动。比较了燃料电池工作状态和非电流状态下的表面反应性和氧（氧化物离子）的扩散率。在燃料电池工作条件下，在阴极和电解质之间的中间层观察到〜（18）O浓度的峰值。这表明〜（18）O电离和扩散的活性位在中间层。而且，由于不连续的〜（18）O分布曲线，可以在层间/电解质界面处形成缓慢的〜（18）O扩散层。

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《International symposium on solid oxide fuel cells;SOFC-XII》|2011年|p.493-498|共6页
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T. Horita; T. Shimonosono; H. Kishimoto; K. Yamaji; M. E. Brito; H. Yokokawa;
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中图分类化学电源、电池、燃料电池;
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4. Imaging of Oxide Ionic Flows at Practical SOFC Cells by Isotope Labeling Technique [C] . T. Horita, T. Shimonosono, H. Kishimoto, International Symposium on Solid Oxide Fuel Cells . 2011

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Imaging of Oxide Ionic Flows at Practical SOFC Cells by Isotope Labeling Technique

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