Electrochemical Activity of Original and Infiltrated Fe-Doped Ba(Ce,Zr,Y)O3-Based Electrodes to Be Used for Protonic Ceramic Fuel Cells
Electrochemical Activity of Original and Infiltrated Fe-Doped Ba(Ce,Zr,Y)O3-Based Electrodes to Be Used for Protonic Ceramic Fuel Cells
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用于质子陶瓷燃料电池的原始和渗透铁掺杂 Ba(Ce,Zr,Y)O3 基电极的电化学活性
DOI：
10.3390/catal12111421
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发表时间：
2022
期刊：
影响因子：
3.9
通讯作者：
D. Medvedev
中科院分区：
文献类型：
--
作者：
Liana R. Tarutina;A. Kasyanova;G. Starostin;G. Vdovin;D. Medvedev
质子陶瓷燃料电池（pcfc）具有高能效、环保性和高耐用性等优点，是电化学能量转换的重要器件。本文对基于BaFexCe0.7-xZr0.2Y0.1O3 -δ (BCZYFx)的pcfc电极的极化特性进行了全面研究。与单个BCZYFx电极一起，我们研究了一种通过在电极材料的多孔结构中引入PrOx电催化剂纳米颗粒来提高其电化学活性的方法。根据实验数据，当x = 0.5, 0.6和0.7时，电活化使电极在700°C时的极化电阻分别从1.16,0.27,0.62 Ω°cm2降低到0.09,0.13,0.43 Ω°cm2。对于使用PrOx纳米颗粒活化的BCZYF0.6组成的空气电极的PCFC电池，可以在750°C下实现300 mW cm-2的最大比功率，这与具有无co阴极的单个电池具有竞争力。获得的结果提供了深入了解在电激活后所研究的电极中发生的过程。通过简单的浸渍法结合后续的热处理，可以实现电极电化学特性的改善。
Proton-ceramic fuel cells (PCFCs) are promising devices for electrochemical energy conversion purposes due to their combination of high energy efficiency, environmental friendliness, and high durability. In the present work, the polarization characteristics of promising electrodes for PCFCs based on BaFexCe0.7–xZr0.2Y0.1O3–δ (BCZYFx) are comprehensively studied. Along with the individual BCZYFx electrodes, we investigated a method for improving their electrochemical activity by introducing nanoparticles of PrOx electrocatalysts into the porous structure of the electrode material. According to the experimental data, electroactivation allowed for the polarization resistances of the electrodes at 700 °C to be reduced from 1.16, 0.27, 0.62 Ω°cm2 to 0.09, 0.13, 0.43 Ω°cm2 for x = 0.5, 0.6, and 0.7, respectively. For a PCFC cell with an air electrode of BCZYF0.6 composition activated using PrOx nanoparticles, it was possible to achieve a maximum specific power of 300 mW cm–2 at 750 °C, which is competitive for a single cell with Co-free cathodes. The results obtained provide insight into the processes occurring in the studied electrodes after electroactivation. It is shown how the improvement of electrochemical characteristics of the electrode can be realized by a simple infiltration method in combination with a subsequent thermal treatment.