Properties and performance of La{sub 1.6}Sr{sub 0.4}NiO{sub 4+{delta}}-Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} composite cathodes for intermediate temperature solid oxide fuel cells
Journal Article
·
· Materials Research Bulletin
- College of Materials Science and Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009 (China)
La{sub 1.6}Sr{sub 0.4}NiO{sub 4+{delta}}-Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} composite cathodes were prepared successfully using combustion synthesis method for intermediate temperature solid oxide fuel cells. The chemical compatibility, thermal expansion behavior, electrical conductivity and electrode performance were studied. The X-ray diffraction of La{sub 1.6}Sr{sub 0.4}NiO{sub 4+{delta}}-Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} composite result proved a slight reaction between La{sub 1.6}Sr{sub 0.4}NiO{sub 4+{delta}} and Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9}. Both the thermal expansion coefficient and the electrical conductivity of La{sub 1.6}Sr{sub 0.4}NiO{sub 4+{delta}}-Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} decreased with increasing Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} content. AC impedance spectroscopy measurements indicated that the addition of 30 wt% Ce{sub 0.8}Sm{sub 0.2}O{sub 1.9} to La{sub 1.6}Sr{sub 0.4}NiO{sub 4+{delta}} exhibited the lowest polarization resistance (0.238 {Omega}cm{sup 2}) at 800 deg. C in air, which was only one fourth of the La{sub 1.6}Sr{sub 0.4}NiO{sub 4+{delta}} electrode measured at the same temperature.
- OSTI ID:
- 22029821
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 8 Vol. 44; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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