Hołówko Bartosz, Karczewski Jakub, Molin Sebastian, Jasiński Piotr
Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, 80-233 Gdańsk, Poland.
Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, ul. G. Narutowicza 11/12, 80-233 Gdańsk, Poland.
Materials (Basel). 2019 Dec 27;13(1):131. doi: 10.3390/ma13010131.
In this work, the infiltration technique was used to produce hydrogen electrodes for solid oxide cells. Different infiltration methodologies were tested in order to try to shorten the infiltration cycle time. The porous scaffolds used for infiltration were based on highly porous yttria-stabilized zirconia (YSZ) obtained by etching the reduced nickel from the Ni-YSZ cermet in HNO acid. The support had a complex structure which included a ~130 µm porous functional layer with small pores and a ~320 µm thick supporting layer with large pores. Infiltrations have been carried out using aqueous nickel nitrate solutions. Various infiltration procedures were used, differing in temperature/time profiles. The results show that slow evaporation is crucial for obtaining a homogeneous material distribution leading to high-quality samples. A longer evaporation time promotes the proper distribution of nickel throughout the porous scaffold. The shortening of the heat treatment procedure leads to blockage of the pores and not-uniform nickel distribution.
在这项工作中，采用浸渍技术制备用于固体氧化物电池的氢电极。为了缩短浸渍循环时间，测试了不同的浸渍方法。用于浸渍的多孔支架基于通过在硝酸中蚀刻Ni-YSZ金属陶瓷中的还原镍而获得的高孔隙率氧化钇稳定氧化锆（YSZ）。载体具有复杂的结构，包括一个约130μm的具有小孔的多孔功能层和一个约320μm厚的具有大孔的支撑层。使用硝酸镍水溶液进行浸渍。采用了各种浸渍程序，温度/时间曲线不同。结果表明，缓慢蒸发对于获得导致高质量样品的均匀材料分布至关重要。较长的蒸发时间促进镍在整个多孔支架中的适当分布。热处理程序的缩短会导致孔隙堵塞和镍分布不均匀。
