Tuning the Thickness of Ba-Containing “Functional” Layer toward High-Performance Ceria-Based Solid Oxide Fuel Cells

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• 作者：Zheng Gong ; Wenping Sun ; Duo Shan ; Yusen Wu ; Wei Liu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：May 4, 2016
• 年：2016
• 卷：8
• 期：17
• 页码：10835-10840
• 全文大小：501K
• 年卷期：0
• ISSN：1944-8252

文摘

Developing highly efficient ceria-based solid oxide fuel cells with high power density is still a big concern for commercial applications. In this work, a novel structured Ce_0.8Sm_0.2O_2−δ (SDC)-based fuel cell with a bilayered anode consisting of Ni-SDC and Ni-BaZr_0.1Ce_0.7Y_0.2O_3-δ (Ni-BZCY) was designed. In addition to the catalysis function, the Ni-BZCY anode “functional” layer also provides Ba source for generating an electron-blocking layer in situ at the anode/electrolyte interface during sintering. The Ni-BZCY thickness significantly influences the quality of the electron-blocking layer and electrochemical performances of the cell. The cell with a 50 μm thick Ni-BZCY layer exhibits the best performance in terms of open circuit voltage (OCV) and peak power density (1068 mW cm^–2 at 650 °C). The results demonstrate that this cell with an optimal structure has a distinct advantage of delivering high power performance with a high efficiency at reduced temperatures.