期刊
TURKISH JOURNAL OF CHEMISTRY
卷 45, 期 5, 页码 1408-1421出版社
Tubitak Scientific & Technological Research Council Turkey
DOI: 10.3906/kim-2104-56
关键词
Ionic conductivity; Sol-gel processes; Samaria-doped-CeO2
资金
- Scientific and Technological Research Council of Turkey (TUBITAK) [216M509]
This study focuses on the effect of different combustion agents on the properties of 20% mole-Sm doped ceria ceramics as a solid electrolyte for solid oxide fuel cells. Triethylene glycol synthesized SDC20 electrolyte shows the highest total ionic conductivity among all the synthesized electrolytes.
The present investigation is emphasized on the effect of various combustion agents on the crystal properties, surface microstructure, and oxygen ion conductivity of 20% mole-Sm doped ceria (Ce0.80Sm0.20O1.90/SDC20) ceramics as solid electrolyte for IT-SOFCs. The most widely used combustion agents for engineering ceramic production as ethylene glycol, diethylene glycol, triethylene glycol, L-alanine, L-valine, glycine, citric acid monohydrate, urea, and EDTA-citric acid were compared in terms of SDC20 properties. X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and electrochemical impedance spectroscopy (EIS) were used to determine the microstructure properties, crystal structure and ionic conductivity of SDC20 powder. XRD pattern of the ceramics revealed the formation of single-phase fluorite structure. According to the results of electrochemical analysis, the maximum total ionic conductivity was observed in SDC20 electrolyte synthesized using triethylene glycol as the fuel among all the synthesized electrolytes (5.72 x 10(-2) S.cm(-1)).
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