Effect of sintering temperature on the microstructure, roughness and electrochemical impedance of electrophoretically deposited YSZ electrolyte for SOFCs

In the present work, the microstructures of YSZ electrolyte films, which were sintered at various temperatures in the range of 1300–1600 °C, were investigated. First, a suitable and uniform film was deposited on the surface of NiO–YSZ composite by EPD. After the consequence sintering, the surfaces o...

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Bibliographic Details
Published in:International journal of hydrogen energy 2010-09, Vol.35 (17), p.9420-9426
Main Authors: Talebi, Tahereh, Haji, Mohsen, Raissi, Babak
Format: Article
Language:English
Subjects:
AFM
Alternative fuels. Production and utilization
Anodic coatings
Applied sciences
Conductivity
Deposition
Electrochemical impedance
Electrolytes
Energy
Exact sciences and technology
Fuels
Hydrogen
Microstructure
Roughness
Sintering
Solid oxide fuel cells
Surface Roughness
YSZ electrolyte
Yttria stabilized zirconia
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Summary:In the present work, the microstructures of YSZ electrolyte films, which were sintered at various temperatures in the range of 1300–1600 °C, were investigated. First, a suitable and uniform film was deposited on the surface of NiO–YSZ composite by EPD. After the consequence sintering, the surfaces of deposited YSZ films were observed by SEM. In addition, other characteristics of the YSZ electrolyte films such as surface roughness and morphology of the sintered films were investigated by AFM. The ability of ionic transfer and permeability of the YSZ electrolyte was examined by electrochemical impedance spectroscopy at different temperatures. It seems that the YSZ electrolyte sintered at 1400 °C was appropriate for SOFCs applications, because this film had the minimum impedance, minimum roughness and the maximum conductivity. Furthermore, the temperature of 1400 °C was the minimum temperature in which a dense film of YSZ was formed uniformly on the surface of anode and coated it completely.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2010.05.079