Tuning the thickness of Ba-containing "functional" layer toward high-performance ceria-based solid oxide fuel cells

Authors

Zheng Gong, University of Science and Technology of China
Wenping Sun, University of WollongongFollow
Duo Shan, University of Science and Technology of China
Yusen Wu, University of Science and Technology of China
Wei Liu, University of Science and Technology of China, Chinese Academy Of SciencesFollow

RIS ID

107675

Publication Details

Gong, Z., Sun, W., Shan, D., Wu, Y. & Liu, W. (2016). Tuning the thickness of Ba-containing "functional" layer toward high-performance ceria-based solid oxide fuel cells. ACS Applied Materials and Interfaces, 8 (17), 10835-10840.

Abstract

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 Ce0.8Sm0.2O2-δ (SDC)-based fuel cell with a bilayered anode consisting of Ni-SDC and Ni-BaZr0.1Ce0.7Y0.2O3-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.