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Enabling fast ionic transport in CeO2-La1-2BaBiFeO3 nanocomposite electrolyte for low temperature solid oxide fuel
Nusrat Shaheen1,2, Zheng Chen1,2, Muneerah Alomar3
1School of Civil Engineering and Architecture, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University Nanning 530004 PR China chenzheng@gxu.edu.cn.
RSC Advances
|July 12, 2023
Summary
Adding La-Ba-Bi-Fe-O3 to ceria creates advanced nanocomposite electrolytes for low-temperature solid oxide fuel cells (LT-SOFCs), boosting performance and conductivity.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Conversion
Background:
- Ionic conductivity in electrolytes is crucial for lowering solid oxide fuel cell (SOFC) operating temperatures.
- Nanocomposite electrolytes offer enhanced ionic conductivity and transport properties for efficient SOFC operation.
Purpose of the Study:
- To fabricate and evaluate CeO2-La1-2Ba-Bi-FeO3 nanocomposites as electrolytes for low-temperature SOFCs (LT-SOFCs).
- To investigate the structural, surface, and electrochemical properties of these nanocomposites.
Main Methods:
- Fabrication of CeO2-La1-2Ba-Bi-FeO3 nanocomposites.
- Characterization using transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS).
- Electrochemical performance testing in LT-SOFCs.
Main Results:
- The optimal 90CeO2-10La1-2Ba-Bi-FeO3 electrolyte achieved a peak power density of 834 mW cm-2 at 550 °C.
- A total conductivity of 0.11 S cm-1 was recorded at 550 °C for the nanocomposite electrolyte.
- Schottky junction formation was observed, effectively suppressing electronic conduction.
Conclusions:
- The incorporation of La1-2Ba-Bi-FeO3 (LBBF) into ceria significantly enhances electrolyte performance for LT-SOFCs.
- These nanocomposite electrolytes represent a promising advancement for high-performance LT-SOFC applications.
