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Structure, Ionic Transport Properties and Scaling Behavior of Eu, Pr, and Sm Co‐Doped Ceria Oxygen Ion Conductors
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In this work, structural, electrical, and scaling behavior of Eu, Pr, and Sm co‐doped ceria‐based ionic conductors are reported. The materials are prepared using citrate‐auto ignition method. The average particle size is found to be within 20 nm. The values of lattice parameter are found to depend on the ionic radius of dopants. Sm–Eu co‐doped ceria shows the highest conductivity and lowest activation energy for the conduction. Pr–Sm co‐doped ceria shows highest and Sm–Eu co‐doped ceria shows lowest migration energy. The values of dc conductivity are found to be consistent with the charge carrier concentration. The relaxation phenomenon is investigated using Cole–Davidson formalism. The scaling behavior of complex impedance plots, impedance and modulus spectra confirm the temperature and dopant‐independent conduction and relaxation mechanism. The impact of multivalency of Pr on conductivity and relaxation is also discussed.
Title: Structure, Ionic Transport Properties and Scaling Behavior of Eu, Pr, and Sm Co‐Doped Ceria Oxygen Ion Conductors
Description:
In this work, structural, electrical, and scaling behavior of Eu, Pr, and Sm co‐doped ceria‐based ionic conductors are reported.
The materials are prepared using citrate‐auto ignition method.
The average particle size is found to be within 20 nm.
The values of lattice parameter are found to depend on the ionic radius of dopants.
Sm–Eu co‐doped ceria shows the highest conductivity and lowest activation energy for the conduction.
Pr–Sm co‐doped ceria shows highest and Sm–Eu co‐doped ceria shows lowest migration energy.
The values of dc conductivity are found to be consistent with the charge carrier concentration.
The relaxation phenomenon is investigated using Cole–Davidson formalism.
The scaling behavior of complex impedance plots, impedance and modulus spectra confirm the temperature and dopant‐independent conduction and relaxation mechanism.
The impact of multivalency of Pr on conductivity and relaxation is also discussed.
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