Title

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

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.

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Link to publisher version (DOI)

http://dx.doi.org/10.1021/acsami.6b01000