Investigation of Pr 0.2 Ce 0.8 O 2-δ @Li 2 CO 3 nanocomposite electrolytes as intermediate temperature ionic conductors: a thermal, structural, and morphological insight

摘要: Pr0.2Ce0.8O2-δ@Li2CO3 (PDC-LC) nanocomposite electrolytes were prepared through the co-precipitation of Pr-doped cerium/lithium complex carbonate and its pre-firing sintering operations. The structural thermal properties PDC-LC investigated by means X-ray diffraction, thermogravimetric analysis, Raman spectroscopy, electrochemical impedance spectroscopy. remarkable presence oxygen vacancies influence interfacial interactions between PDC crystallites amorphous Li2CO3 deliberately probed spectroscopy FEG-SEM, respectively. It was observed that there is a long-range interaction phase, which resulted in tight binding $$ {\mathrm{CO}}_3^{2-} $$ ions on facets nano-crystals may be well characterized shift broadening characteristic spectroscopic peaks samples. diffraction results confirm successful incorporation praseodymium into ceria phase presented sole crystalline structure contrarily to lithium present as an as-prepared ionic conductivity behaviors measured at intermediate operating temperature range (300–500 °C). However, AC measurements demonstrated conductivities air atmosphere increased linearly with temperature. Arrhenius plot total showed two different slopes indicating distinct conduction mechanisms. LC inside responsible for conductivity.