Fabrication and preliminary testing of patterned silver cathodes for proton conducting IT-SOFCs
Fabrication and preliminary testing of patterned silver cathodes for proton conducting IT-SOFCs
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用于质子传导 IT-SOFC 的图案化银阴极的制造和初步测试
DOI：
10.1039/d3ma00793f
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发表时间：
2024
影响因子：
5
通讯作者：
Cheng, Zhe
中科院分区：
文献类型：
--
作者：
Sozal, Md Shariful;Li, Wenhao;Das, Suprabha;Jafarizadeh, Borzooye;Chowdhury, Azmal Huda;Wang, Chunlei;Cheng, Zhe
在质子导电的BaZr0.4Ce0.4Y0.1Yb0.1O3−δ (BZCYYb4411)电解质上，采用光刻和电子束蒸发法制备了长度（LTPB）和电极面积（AELT）确定的三相边界（电解质、电极和气体界面之间的TPB）的致密银（Ag）阴极。对于成功的图像化阴极制造而言，双层阻蚀剂方法似乎比单层阻蚀剂方法更通用。采用电化学阻抗谱法（EIS）测试了图案银阴极在不同温度、不同浓度O2和H2O气氛下在BZCYYb4411电解质上的电化学行为。结果使用松弛时间分布（DRT）和反应顺序分析进行处理，并拟合到等效电路中。指出了今后在不同LTPB和AELT的图案电极和理论计算方面的研究方向，以进一步了解质子导电电解质上阴极氧还原反应的动力学和机理。
Dense silver (Ag) cathodes with defined triple phase boundary (TPB between the interface of electrolyte, electrode, and gas) lengths (LTPB) and electrode areas (AELT) were fabricated by photolithography and E-beam evaporation over a proton conducting BaZr0.4Ce0.4Y0.1Yb0.1O3−δ (BZCYYb4411) electrolyte. A bi-layer lift-off resist method appears to be more versatile than a single layer lift-off resist method for successful patterned cathode fabrication. The electrochemical behaviors of the patterned Ag cathodes over the BZCYYb4411 electrolyte were tested by electrochemical impedance spectroscopy (EIS) at different temperatures in atmospheres with different concentrations of O2 and H2O. The results were processed using Distribution of Relaxation Times (DRT) and reaction order analyses and also fitted to equivalent circuits. The directions for future work on patterned electrodes with different LTPB and AELT and theoretical calculations to gain further insights into the kinetics and mechanism of the cathode oxygen reduction reaction (ORR) over proton conducting electrolytes are pointed out.