Open AccessEffect of fuel choice on conductivity and morphological properties of samarium doped ceria electrolytes for IT-SOFC
Author(s) -
Burcu Aygün,
Vedat Sarıboğa,
M.A. Faruk Öksüzömer
Publication year - 2021
Publication title -
turkish journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 46
eISSN - 1303-6130
pISSN - 1300-0527
DOI - 10.3906/kim-2104-56
Subject(s) - chemistry , ionic conductivity , thermogravimetric analysis , ethylene glycol , conductivity , microstructure , electrolyte , inorganic chemistry , dielectric spectroscopy , scanning electron microscope , chemical engineering , nuclear chemistry , electrochemistry , materials science , organic chemistry , crystallography , electrode , engineering , composite material
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 (Ce 0.80 Sm 0.20 O 1.90 /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 ).