| Electrochemical Performance and Stability of LNC-infiltrated (La,Sr)MnO3 Oxygen Electrode |
| Paper ID : 1334-UFGNSM-FULL |
| Authors: |
|
Shamim Shahrokhi1, A. Babaei *2, Cyrus Zamani2 12 schools of Technical College - after Jalal Ale Ahmad - Tehran North Kargar - Tehran - Iran 2School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran |
| Abstract: |
| Renewable energy sources such as solar and wind power provide opportunities to mitigate greenhouse emissions and supply sustainable energy to replace limited fossil fuels. In this regard, varieties of alternative energy conversion and storage technologies are under development. Solid oxide electrochemical cells (SOCs) can be applied for the conversion of electricity to chemical fuel (electrolysis mode) and for conversion of fuel to electricity (fuel cell mode). LNC-infiltrated La0.8Sr0.2MnO3 (LSM) is studied as oxygen electrode in solid oxide cells (SOCs). Incorporation of small amounts of LNC nanoparticles was found to cause significant increase in the electro-catalytic activity and stability of the LSM oxygen electrodes. In this study, the electrochemical impedance responses of an LSM and LNC-infiltrated LSM electrode were measured at 800 °C in air. Also, activation energy for both LSM and LNCinfiltrated LSM electrodes was measured to be 1.36 eV. Results indicate that polarization resistance (Rp) decreases by increasing temperature and operating in reversible condition. Moreover, infiltrating of LNC nanoparticles decreases the polarization resistance of the LSM oxygen electrode, thus promoting diffusion phenomena. |
| Keywords: |
| solid oxide cells; reversible operation; LSM; oxygen electrode; electrochemical parameters; polarization |
| Status : Paper Accepted (Oral Presentation) |
