Kalinina Elena, Shubin Kirill, Pikalova Elena
Laboratory of Complex Electrophysic Investigations, Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, 620016 Yekaterinburg, Russia.
Department of Physical and Inorganic Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Yekaterinburg, Russia.
Membranes (Basel). 2022 Mar 9;12(3):308. doi: 10.3390/membranes12030308.
In this study, the technology of electrophoretic deposition (EPD) micrometer barrier layers based on a BaCeSmCuO (BCSCuO) protonic conductor on dense carrying CeSmO (SDC) solid-state electrolyte substrates is developed. Methods for creating conductive sublayers on non-conductive SDC substrates under EPD conditions, such as the synthesis of a conductive polypyrrole (PPy) layer and deposition of a layer of finely dispersed platinum from a suspension of its powder in isopropanol, are proposed. The kinetics of disaggregation, disperse composition, electrokinetic potential, and the effect of adding iodine to the BCSCuO suspension on these parameters as factors determining the preparation of stable suspensions and successful EPD processes are explored. Button cells based on a carrying SDC electrolyte of 550 μm in thickness with BCSCuO layers (8-35 μm) on the anode, cathode, and anode/cathode side, and Pt electrodes are electrochemically tested. It was found that the effect of blocking the electronic current in the SDC substrate under conditions was maximal for the cells with barrier layers deposited on the anode side. The technology developed in this study can be used to fabricate solid oxide fuel cells with doped CeO electrolyte membranes characterized by mixed ionic-electronic conductivity (MIEC) under reducing atmospheres.
在本研究中，开发了一种基于BaCeSmCuO（BCSCuO）质子导体在致密的CeSmO（SDC）固态电解质基底上电泳沉积（EPD）微米级阻挡层的技术。提出了在EPD条件下在非导电SDC基底上创建导电亚层的方法，例如合成导电聚吡咯（PPy）层以及从其粉末在异丙醇中的悬浮液中沉积一层细分散的铂。研究了BCSCuO悬浮液的解聚动力学、分散组成、动电位以及添加碘对这些参数的影响，这些参数是决定制备稳定悬浮液和成功进行EPD过程的因素。对基于厚度为550μm的承载SDC电解质、在阳极、阴极和阳极/阴极侧具有BCSCuO层（8 - 35μm）以及Pt电极的纽扣电池进行了电化学测试。结果发现，在阳极侧沉积阻挡层的电池，在特定条件下SDC基底中电子电流的阻断效果最大。本研究中开发的技术可用于制造具有掺杂CeO电解质膜的固体氧化物燃料电池，该电解质膜在还原气氛下具有混合离子 - 电子导电性（MIEC）。
