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| Abstract No.: |
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| Title: |
Preparation of nano-structured SOFC electrolyte coating by radio frequency suspension plasma spraying
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| Authors: |
Lu Jia / Université de Sherbrooke
Energy, Plasma and Electrochemistry Research Centre (CREPE), Canada
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| Abstract: |
Nano-structured SOFC electrolyte coatings have been prepared by radio frequency suspension plasma spraying (SPS) technique. Plasma spraying processes have been optimized and tailored in order to achieve a high power density electrolyte. The microstructure of depositions was characterized using scanning electron microscopy and X-ray diffraction. Electrochemical impedance spectroscopy was applied to investigate the electrolyte resistance.
The results show that nano-structured thin and dense electrolytes (~ 5µm thick) have been successfully SPS deposited on porous anodes with stable and uniform microstructure controlled in the grain size range of 15-40 nm. The electrolyte layer is completely dense and even the closed pores are almost eliminated. The fine particles of well-dispersed GDC penetrate the pores and cracks of the anode to improve the adhesion of the interface, as well as to increase of the number of active reaction sites. It is beneficial for the improvement of the performance of the films to be used as SOFC electrolytes.
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