期刊
JOURNAL OF POWER SOURCES
卷 314, 期 -, 页码 10-17出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.02.079
关键词
Ceria catalyst; Inert-substrate supporter; Solid oxide fuel cell; Methane
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2013R1A1A2062172]
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant - Korea government Ministry of Trade, Industry and Energy [20134030200330]
- Nature Science foundation of China [51572204]
- Ferro Electronic Materials Systems
A ceria catalyst is applied to an inert-substrate supported tubular single cell for direct operation on methane fuel. The tubular single cell comprises a porous yttria-stabilized zirconia (YSZ) supporter, a Ni-Ce0.8Sm0.2O1.9 anode, a YSZ/Ce0.8Sm0.2O1.9 bi-layer electrolyte, and a La0.6Sr0.4Co0.2Fe0.8O3-delta cathode. The ceria catalyst is incorporated into the porous YSZ supporter layer by a cerium nitrate impregnation. The effects of ceria on the microstructure and electrochemical performance of the tubular single cell are investigated with respect to the number of impregnations. The optimum number of impregnations is determined to be four based on the maximum power density and polarization property of the tubular single cell in hydrogen and methane fuels. At 700 degrees C, the tubular single cell shows similar maximum power densities of similar to 260 mW cm(-2) in hydrogen and methane fuels, respectively. Moreover, the ceria catalyst significantly improves the performance stability of the cell running on methane fuel. At a current density of 350 mA cm(-2), the single cell shows a low degradation rate of 2.5 mV h(-1) during the 13 h test in methane fuel. These results suggest the feasibility of applying the ceria catalyst to the inert-substrate supported tubular single cell for direct operation on methane fuel. (C) 2016 Elsevier B.V. All rights reserved.
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