Electrochemical Analysis of Nanoscaled Ba0.5Sr0.5Co0.8Fe0.2O3-δ Thin-Film Cathodes
Electrochemical Analysis of Nanoscaled Ba0.5Sr0.5Co0.8Fe0.2O3-δ Thin-Film Cathodes
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DOI：
10.1149/2.0861409jes
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发表时间：
2013-10
影响因子：
3.9
通讯作者：
K. Asano;Dino Klotz;J. Hayd;J. Szász;E. Ivers-Tiffée
中科院分区：
文献类型：
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作者：
K. Asano;Dino Klotz;J. Hayd;J. Szász;E. Ivers-Tiffée
采用电化学阻抗谱（EIS）研究了Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 o3 -δ (BSCF)纳米薄膜阴极的性能。在ce0.9 Gd 0.1 O 1.95电解质球团上制备的薄膜阴极的膜厚小于100 nm。在500 ~ 625℃和0.01 ~ 0.5 atm的不同温度和氧分压条件下，用EIS系统地对纳米级BSCF薄膜阴极进行了性能评价。然后通过计算松弛时间（DRT）分布和复杂非线性最小二乘拟合对阻抗数据进行分析。确定了与阴极反应相关的五个独立过程。在600℃时测得低至39 mΩcm 2的区域极化电阻。
The performance of nanoscaled Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) thin-film cathodes was investigated by electrochemical impedance spectroscopy (EIS). Thin-film cathodes derived by metal-organic deposition on Ce 0.9 Gd 0.1 O 1.95 electrolyte pellets exhibited a film thickness of< 100 nm. Performance evaluations of the nanoscaled BSCF thin-film cathodes were systematically conducted on symmetrical cells by EIS with varying temperatures and oxygen partial pressures in the range of 500–625 C and 0.01–0.5 atm, respectively. The impedance data were then analyzed by calculating the distribution of relaxation times (DRT) and by complex nonlinear least squares fitting. Five independent processes associated with the cathode reaction were identified. Area-specific polarization resistances as low as 39 mΩcm 2 were measured at 600 C.