Anjul Agarwal
anjul_g@rediffmail.com
International Journal of ChemTech Research
IJCTR
0974-4290
2455-9555
10.20902/CT
http://www.sphinxsai.com/chemtech.php
-
2019
12
02
Synthesis and Characterization of Ce0.9Sm0.05Pr0.05O1.95 as a solid electrolyte for intermediate-temperature solid oxide fuel cell
Lemessa Asefa
Eressa
1
PV Bhaskara
Rao
2
Wollega University, Department of Physics, Nekemte, Ethiopia
Wollega University, Department of Physics, Nekemte, Ethiopia
2019
28
36
120205
10.20902/IJCTR.2019.120205
http://dx.doi.org/10.20902/IJCTR.2019.120205
Co-doped sample of electrolyte Ce0.9Sm0.05Pr0.05O1.95 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 14000C isabout98%
of theoretical density. The average grain size of Ce0.9Sm0.05Pr0.05O1.95 sample found from
SEM image is 451.4nm. The Raman spectra result showed formation of two distinctive peaks in
the Ce0.9Sm0.05Pr0.05O1.95 lattice. The peak at lower wavenumber (463) cm-1) can be attributed
to F2g vibration mode (O-Ce-O) of the fluorite-like structure of pure CeO2. Besides, the peak at
higher wavenumber (564) cm-1 can be ascribed to the oxygen vacancies extrinsically introduced
into Ce0.9Sm0.05Pr0.05O1.95 for maintaining the charge neutrality.The ionic conductivity and
activation energy of Ce0.9Sm0.05Pr0.05O1.95 found at 5000C was(5.95 x10-3S/cm, Ea = 0.64eV)
respectively. All the results confirmed that Ce0.9Sm0.05Pr0.05O1.95 is a promising alternative
electrolyte for intermediate temperature solid oxide fuel cell (IT-SOFC) applications.
http://sphinxsai.com/2019/ch_vol12_no2/1/(28-36)V12N2CT.pdf
IT-SOFCS
electrolyte
Ce0.9Sm0.05Pr0.05O1.95
ionic conductivity
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