Synthesis and characterization of nanocrystalline Ni-YSZ cermet anode for SOFC

Journal Article · Fri Jan 15 00:00:00 EST 2010 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2009.10.005· OSTI ID:22066170

Priyatham, T ^[1]; Bauri, Ranjit ^[1]

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1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600 036 (India)

Ni-YSZ cermet anode has been synthesized in one step using a simple and cost effective combustion synthesis process. The processed powder of NiO-YSZ is found to be nanocrystalline with crystallite sizes of 29 and 22 nm for NiO and YSZ respectively by X-ray diffraction and transmission electron microscopy analysis. X-ray diffraction analysis also shows that the precursor salts are converted to highly crystalline phases of NiO and YSZ (8 mol% Y{sub 2}O{sub 3}) without any intermediate calcination step and no undesirable phases are present. Comparison with the X-ray diffraction pattern of a commercial YSZ sample shows that the process is also effective in maintaining a close compositional control. The microstructure of the sintered and reduced sample shows a well defined network of pores which is necessary for the effective functioning of the anode. The electrical conductivity as a function of temperature shows metallic behavior.

• OSTI ID: 22066170
• Journal Information: Materials Characterization, Vol. 61, Issue 1; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ANODES
CALCINATION
CERMETS
COMPARATIVE EVALUATIONS
CRYSTALS
ELECTRIC CONDUCTIVITY
MICROSTRUCTURE
NANOSTRUCTURES
NICKEL OXIDES
POWDERS
SOLID OXIDE FUEL CELLS
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YTTRIUM OXIDES
ZIRCONIUM OXIDES