High Performance Solid Oxide Electrolysis Cells with Hierarchically Porous Ni-YSZ Electrode
High Performance Solid Oxide Electrolysis Cells with Hierarchically Porous Ni-YSZ Electrode
复制标题
具有分级多孔 Ni-YSZ 电极的高性能固体氧化物电解池
DOI：
10.1149/07801.3217ecst
复制
发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
Chen Fanglin
中科院分区：
文献类型：
--
作者：
Lei Libin;Chen Yu;Zhang Yanxiang;Liu Tong;Wang Yao;Chen Fanglin
In solid oxide electrolysis cells (SOECs), the microstructure of the fuel electrode (Ni-YSZ) has a great influence on the electrochemical performance of cells. In this study, novel hierarchical Ni-YSZ electrode with open channel pores has been fabricated by freeze-drying tape casting (FDTC). The microstructure of the Ni-YSZ electrode was characterized using SEM, mercury intrusion, 3D X-ray microscopy and gas permeability, showing that Ni-YSZ electrode fabricated by FDTC has large porosity and low tortuosity factor, which are beneficial for gas transport. SOECs with the Ni-YSZ electrode fabricated from FDTC display excellent performance (-0.95 A cm-2 with 1.3 V at 750 o C) in the electrolysis mode, which is twice of that with the conventional sponge-like Ni-YSZ electrode fabricated from dry-pressing (DP). Furthermore, hierarchically porous Ni-YSZ electrode is more obvious in the electrolysis mode than the fuel cell mode, probably due to the slower diffusion of H2O and CO2 than H2.
