Structural, Thermal, and Electrochemical Properties of Ce [sub.0.8−2x] Sm [sub.0.2] Zr[sub.x] Mg[sub.x] O[sub.2−d], {x = 0.05, 0.1 0.15} Promising Electrolyte Compounds for Applications

• Published in: Energies (Basel) Vol. 16; no. 13
• Main Authors: Abdalla, Abdalla. M, Azad, Abul K, Dawood, Mohamed M. K, Taweekun, Juntakan
• Format: Journal Article
• Language: English
• Published: MDPI AG 01-06-2023
• Subjects: Chemical properties; Electrochemical reactions; Electrolytes; Energy minerals; Fossil fuels; Fuel cell industry; Fuel cells
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en16134923

CSZM compounds were synthesized by dry chemistry route with 5, 10, and 15% dopant of Mg dopants in the Ce [sub.0.8−2x] Sm [sub.0.2] Zr[sub.x] Mg[sub.x] O[sub.2−d], {x = 0.05, 0.1 & 0.15}. The newly investigated materials were physically, chemically, and electrochemically studied and have shown promising results. The CSZM was crystalized in a fluorite structure with a pure cubic phase in a space group Fm3m and cell parameter a = 5.401742 °A and theoretical density from 7.6 to 8.9 after firing in the air with a final temperature of 1400 °C. Characterization of the structure and indexing of electrolyte materials were made after X-ray diffraction (XRD) testing. A Scanning electron microscope (SEM) morphological analysis was used to examine the microstructure details. Electrochemical impedance spectroscopy (EIS) measurements were performed from 400 °C to 700 °C which show the highest conductivity value of 1.0461 × 10[sup.+1] S/cm at 700 °C. In comparison, the minimum value was 2.7329 × 10[sup.−2] S/cm at 400 °C, and the total activation energy (E[sub.a]°A) was found to be 0.6865 eV under 5% H[sub.2]/Ar.