No abstract

Co-doped sample of electrolyte have been preparedby Solgel method and characterized to explore its use as a solid electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs).The crystal structure, microstructure, and ionic conductivity have been determined by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy dispersive X-ray spectrometer (EDX), Raman Spectroscopy (Raman), and impedance spectroscopy, respectively. The XRD result reveals that the sample is single phase with cubic fluorite-type structure. The relative density of sample sintered at 1400 0 C isabout98% of theoretical density. The average grain size of sample found from SEM image is 451.4nm. The Raman spectra result showed formation of two distinctive peaks in the lattice. The peak at lower wavenumber (463) cm-1) can be attributed to F 2g vibration mode (O-Ce-O) of the fluorite-like structure of pure CeO 2. Besides, the peak at higher wavenumber (564) cm-1 can be ascribed to the oxygen vacancies extrinsically introduced into for maintaining the charge neutrality.The ionic conductivity and activation energy of found at 500 0 C was(5.95 x10-3 S/cm, Ea = 0.64eV) respectively. All the results confirmed that is a promising alternative electrolyte for intermediate temperature solid oxide fuel cell (IT-SOFC) applications.