材料科学
电极
电化学
氧化物
高温电解
克拉克电极
极化(电化学)
电解
热膨胀
化学工程
氧气
氧化钇稳定氧化锆
分析化学(期刊)
无机化学
陶瓷
复合材料
化学
冶金
物理化学
电解质
立方氧化锆
工程类
有机化学
色谱法
作者
Guozhu Zheng,Guangjun Zhang,Kui Liu,Zuzhi Huang,Ting Chen,Juan Zhou,Shaorong Wang
标识
DOI:10.1016/j.ijhydene.2022.12.195
摘要
Reversible solid oxide cells (RSOCs) are clean and effective electrochemical conversion devices that require highly active electrodes and stable electrochemical performance for the practical application. Herein, we investigate a series of La0.8-xBixSr0.2Ni0.2Fe0.8O3-δ (LBSNF-x, x = 0.0, 0.05, 0.1, 0.15) oxides as the potential oxygen electrode material for RSOCs. The properties of electrical conductivity, thermal expansion coefficient, and chemical compatibility with the Ce0.9Gd0.1O1.95 (GDC) barrier layer of LBSNF-x oxides are evaluated. When LBSNF-0.1 and GDC forms a composite oxygen electrode with the ratio of 7:3, it shows the lowest polarization resistance with fastest oxygen reduction reaction activity in the symmetrical cell test. Then the cell with the configuration of Ni-YSZ/YSZ/GDC/LBSNF-0.1-GDC was prepared and evaluated both in fuel cell (FC) and electrolysis cell (EC) mode. The maximum power density of 824 mW cm−2 is obtained at 800 °C in FC mode, and current density of 1.20 A cm−2 is achieved under 50% steam content at 1.3 V in EC mode. Additionally, the cell exhibits good stability both in FC and EC mode after 80 h test at 700 °C. The results of this work provide a strong support for application of the LBSNF-0.1-GDC oxygen electrode for reversible solid oxide cells.
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