NDLI: Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells

Content Provider	Springer Nature Link
Author	Stojmević, M. Žunić, M. Gulicovski, J. Bajuk Bogdavić, D. Holclajtner Antuvić, I. Dodevski, V. Mentus, S.
Copyright Year	2015
Abstract	The solid solutions of CeO$_{2}$ with one or more rare-earth oxides among Yb$_{2}$O$_{3}$, Sm$_{2}$O$_{3}$, and Gd$_{2}$O$_{3}$ are synthesized by either modified glycine nitrate procedure (MGNP) or self-propagating reaction at room temperature (SPRT). The overall mole fraction of rare-earth oxide dopants was x = 0.2. The characterization was committed by XRPD, TEM, BET, and Raman Spectroscopy methods. According to XRPD and Raman spectroscopy, the obtained products presented the single-phase solid solutions with basic fluorite-type CeO$_{2}$ structure, regardless on the number and the concentration of dopants. Both XRPD and TEM analysis evidenced the nanometer particle dimensions. The defect model was applied to calculate lattice parameters of single-, co-, and multi-doped solids. The sintering of the sample nanopowders was performed at 1550 °C, in air atmosphere. The sintered samples were characterized by XRPD, SEM, and complex impedance methods. The sintering did not affect the concentration ratios of the constituents. The highest conductivity at 700 °C amounting to 2.14 × 10$^{−2}$ and 1.92 × 10$^{−2}$ Ω$^{−1}$ cm$^{−1}$ was measured for the sample Ce$_{0.8}$Sm$_{0.08}$Gd$_{0.12}$O$_{2−δ}$, synthesized by SPRT and MGNP methods, respectively. The corresponding activation energies of conductivity, measured in the temperature range 500–700 °C, amounted to 0.24 and 0.23 eV.
Starting Page	3781
Ending Page	3794
Page Count	14
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	50
Issue Number	10
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2015-03-11
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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