| Electrochemical properties of Ba0.5Sr0.5Co0.8Fe0.2O3 and BaZr0.65Ce0.20Y0.15O3 composite cathodes on Y-doped barium–cerium–zirconium oxide solid electrolyte |
| Jun Seo1, Hye-Won Kim2,3, Ji Haeng Yu2, Hee Jung Park1 |
1Department of Materials Science and Engineering, Dankook University, 119 Dandae-ro, Cheonan 31116, Korea
2Korea Institute of Energy Research (KIER) , 152 Gajeong-ro , Daejeon 34101 , Korea
3Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Korea |
|
|
|
Received: August 4, 2021; Revised: October 21, 2021 Accepted: November 23, 2021. Published online: March 31, 2022. |
|
|
|
| ABSTRACT |
|
Various Ba0.5Sr0.5Co0.8Fe0.2O3–BaZr0.65Ce0.20Y0.15O3 composites have been prepared for cathode materials for intermediate-temperature solid oxide fuel cells. Their electrochemical properties on a barium–zirconium-cerate solid electrolyte have been investigated using 2-probe ac impedance measurement. Impedance spectra are measured to investigate their cathodic polarization resistances in cells in a symmetric configuration. The Ba0.5Sr0.5Co0.8Fe0.2O3–BaZr0.65Ce0.20Y0.15O3 composite fired at 900 °C shows low polarization resistance of ~ 0.16 Ωᜃcm 2 at 700 °C, which is an improved value over the Ba0.5Sr0.5Co0.8Fe0.2O3 due to enhanced ionic conduction. |
| Key words:
Composite cathode · Protonic conducting solid electrolyte · Impedance spectroscopy · Cathodic polarization resistance |
|
PDF Links 
Full text via DOI
Download Citation 
