| Structural and Electrical Properties of Gd Doped CeO2
(GDC) Nanoceramics for Solid Oxide Fuel Cell Applications |
Taranveer Kaur, Raman Kumar, Savidh Khan, Kulvir Singh and Jayant Kolte*
Pages : 127-132
DOI : 10.1080/0371750X.2022.2115400
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| Abstract |
| In the present work, gadolinium doped ceria (Gd0.1Ce0.9O2-, GDC) is prepared via
sol-gel technique. The as-prepared samples are calcined at different temperatures
followed by sintering at various temperatures to obtain uniform microstructure and
dense samples. The most uniformly distributed grains with less porosity are obtained
for sintered samples at 1450oC for 6 h with an average grain size of 0.85 m. Singlephase
cubic fluorite structure is confirmed by X-ray diffraction analysis. Conductivity
analysis reveals that GDC exhibited conductivity around 4.6 × 10–3 S.cm–1 at 550oC.
The activation energy of 1.01 eV indicates that ions dominate the conduction, which
is best for SOFC electrolytes. This conductivity has been achieved at lower sintering
temperatures (1450oC) than the solid-state reaction method (1600oC).
[Keywords: Fuel cells, Sintering, Sol-gel processes, X-ray methods, Ionic conductivity,
GDC] |
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