Gadolinium doped cerium (GDC) is a potential candidate as electrolyte in the solid oxide fuel cells operating in intermediate temperatures. The optimum performance of GDC is obtained only when sintered at higher temperatures (~1400°C), where cerium is prone to reduction. Improvement in the conductivity and stability of GDC is expected by doping it with trivalent ions. In the present context, successful attempts have been made to synthesize Ce0.8Gd0.1Sb0.1O2-δ by solid state reaction and solution combustion methods. X-ray diffraction pattern confirms the cubic fluorite structure of the synthesized samples with nano crystallite size. On doping GDC with trivalent ion Sb3+, the crystallite size is decreased and the sintering temperature is reduced. The combustion samples have lesser crystalline size and greater lattice parameter compared to the solid state sample. Low activation energy is obtained for the synthesized samples. Keywords: Electrolyte, solution combustion, X-ray diffraction, activation energy, ionic conductivity Cite this Article Chitra Priya NS, Sandhya K, Rajendran Deepthi N. Modification of Structural and Electrical Properties of GDC with Sb3+ Ions. NanoTrends: A Journal of Nanotechnology and its Applications. 2016; 18(3): 27–35p.
