Effect of dip coating parameters on microstructure and thickness of 8YSZ electrolyte coated on NiO-YSZ by sol-gel process for SOFCs applications
8 mol % Yttria stabilized zirconia (8YSZ) coatings are widely used as electrolytes in solid oxide fuel cells (SOFCs). In this study, sol-gel process was used in order to in-situ synthesis of 8YSZ electrolyte layer on NiO-8YSZ substrate applying dip coating method. Solid content, viscosity and withdr...
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Published in | Ceramics international Vol. 48; no. 11; pp. 16091 - 16098 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.06.2022
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Subjects | |
Online Access | Get full text |
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Summary: | 8 mol % Yttria stabilized zirconia (8YSZ) coatings are widely used as electrolytes in solid oxide fuel cells (SOFCs). In this study, sol-gel process was used in order to in-situ synthesis of 8YSZ electrolyte layer on NiO-8YSZ substrate applying dip coating method. Solid content, viscosity and withdrawal speed were investigated as effective parameters that affect quality and thickness of coatings. Fourier transform infrared radiation (FTIR), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analyses were used to evaluate the microstructure of 8YSZ film. A dense and uniform coating was obtained with increasing solid content. Reduced viscosity also yielded a better uniformity and formed crack free coatings. Thickness of coatings was controlled by withdrawal speed. Results reveal that a dense and uniform coating was obtained with molar ratio of 1−PropanolZr = 10 using sol only 5min after preparation. Minimum thickness was measured 10 μm at withdrawal speed of 1 cm/min. |
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ISSN: | 0272-8842 1873-3956 |
DOI: | 10.1016/j.ceramint.2022.02.155 |