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- Title
Synthesis and Performance Tuning of Sm<sub>0.2</sub>Ce<sub>0.8</sub>O<sub>2−δ</sub> Electrolyte for Low Temperature Solid Oxide Fuel Cell Application.
- Authors
Gilbile, T. L.; Pawar, R. S.; Kapatkar, V. N.; Kamble, R. C.; Pawar, S. S.
- Abstract
The charge transportation in the solid oxide fuel cell electrolyte, Sm0.2Ce0.8O2−δ (SDC); has been elucidated by using DC and AC measurements as a function of grain size at temperature 500°C. Initially, chemically homogeneous pellets of SDC were prepared using its powder synthesized by oxalate co-precipitation method and then mean crystallite-size of the SDC samples was varied by adjusting the sintering temperature. The mean crystallite-size was calculated from x-ray diffraction data by using the Debye–Scherrer equation. Further, the samples were examined for their crystal structure, crystallite-size and chemical homogeneity. Electrochemical impedance spectroscopy was used to understand electrical properties of the samples and its correlation with crystallite-size was revealed. SDC samples having larger crystallites exhibited higher electrical conductivity by providing a number of mobile oxygen ions for conduction. However, a lesser number of oxygen ion vacancies across crystallite-boundaries become a hurdle for oxygen migration through samples having small crystallite-size.
- Subjects
SOLID oxide fuel cells; GRAIN size; SINTERING; X-ray diffraction; OXALATES
- Publication
Journal of Electronic Materials, 2019, Vol 48, Issue 6, p4117
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-019-07184-9