Anode-supported solid oxide fuel cells based on Sm0.2Ce0.8O1.9 electrolyte fabricated by a phase-inversion and drop-coating process

作者：Sun, Haibin; Chen, Yu; Yan, Ruiqiang; Wei, Tao; Zhang, Yujun; Zhang, Qiaobao; Bu, Yunfei; Liu, Meilin^*

来源：International Journal of Hydrogen Energy, 2016, 41(25): 10907-10913.

DOI：10.1016/j.ijhydene.2016.03.166

• Anode-supported solid oxide fuel cells
• Phase-inversion
• Direct drop-coating
• Sm0.2Ce0.8O1.9 electrolyte

The performance of anode-supported solid oxide cells is often limited by gas transport in the thick anode substrate. In this study, anode-supported solid oxide fuel cells with a cell configuration of Ni-Sm0.2Ce0.8O1.9 (SDC)vertical bar SDC vertical bar Sm0.5Sr0.5CoO3 (SSC)-SDC are fabricated by a combination of phase-inversion tape-casting, direct drop-coating on the green anode, and co-firing. The porous anode substrate is composed of a thin skin layer, a thick finger-like porous layer, and a thin sponge-like porous layer. The skin layer with fine pores offers extended three-phase boundaries (TPBs) at the electrolyte/anode interface while the finger like porous layer/support provides pore channels for efficient mass transport. Dense SDC electrolyte membranes with a thickness of similar to 15 mu m are obtained at a relatively low co-firing temperature (1400 degrees C) due to the large sintering shrinkage of the green anodes. Peak power densities of 0.608 Wcm(-2) at 600 degrees C and 0.789 Wcm(-2) at 650 degrees C have been demonstrated using humidified (3 vol. % water vapor) H-2 as fuel and ambient air as oxidant, suggesting that the triple-layered anode effectively decreases the anode polarization resistance and thus enhances the cell performance.

• 出版日期2016-7-6
• 单位山东大学