无孔 Bi(1-x)Sr(x)FeO(3-δ) 薄膜的快速氧交换动力学。
Fast oxygen exchange kinetics of pore-free Bi(1-x)Sr(x)FeO(3-δ) thin films.
机构信息
Max Planck Institute for Solid State Research, Stuttgart, Germany.
出版信息
Phys Chem Chem Phys. 2011 Oct 6;13(37):16530-3. doi: 10.1039/c1cp21684h. Epub 2011 Aug 22.
The oxygen incorporation/extraction kinetics of the potential solid oxide fuel cell (SOFC) cathode material Bi(1-x)Sr(x)FeO(3-δ) with x = 0.5 and 0.8 was studied by electrochemical impedance spectroscopy on geometrically well-defined pore-free thin film electrodes. The oxygen exchange rate was found to be higher than that of La(1-x)Sr(x)FeO(3-δ) and-among cobalt-free perovskites-only surpassed by Ba(1-x)Sr(x)FeO(3-δ) which is however known to be unstable in a SOFC environment.
采用电化学阻抗谱技术，在具有良好几何形状的无孔薄膜电极上，对组成分别为 x = 0.5 和 0.8 的潜在固体氧化物燃料电池 (SOFC) 阴极材料 Bi(1-x)Sr(x)FeO(3-δ) 的氧掺入/提取动力学进行了研究。发现其氧交换速率高于 La(1-x)Sr(x)FeO(3-δ)，并且在无钴钙钛矿中仅低于 Ba(1-x)Sr(x)FeO(3-δ)，然而后者已知在 SOFC 环境中不稳定。
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