Aygün Burcu, Sariboğa Vedat, Öksüzömer Mehmet Ali Faruk
Mechanical Engineering Department, Engineering Faculty, Özyeğin University, İstanbul Turkey.
Chemical Engineering Department, Engineering Faculty, İstanbul University-Cerrahpaşa, İstanbul Turkey.
Turk J Chem. 2021 Oct 19;45(5):1408-1421. doi: 10.3906/kim-2104-56. eCollection 2021.
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 (CeSmO/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 S.cm).
本研究着重探讨了各种燃烧剂对20%摩尔分数钐掺杂二氧化铈（CeSmO/SDC20）陶瓷晶体性能、表面微观结构及氧离子电导率的影响，该陶瓷作为固体电解质用于中温固体氧化物燃料电池（IT-SOFCs）。就SDC20的性能而言，对工程陶瓷生产中最常用的燃烧剂，如乙二醇、二甘醇、三甘醇、L-丙氨酸、L-缬氨酸、甘氨酸、一水柠檬酸、尿素和乙二胺四乙酸-柠檬酸进行了比较。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、热重分析（TGA）和电化学阻抗谱（EIS）来测定SDC20粉末的微观结构性能、晶体结构和离子电导率。陶瓷的XRD图谱显示形成了单相萤石结构。根据电化学分析结果，在所有合成电解质中，以三甘醇作为燃料合成的SDC20电解质中观察到最大的总离子电导率（5.72×10 S·cm）。
