| 초록 |
(La0.8Sr0.2)0.95MnO3/YSZ and (La0.8Sr0.2)0.95CoO3/YSZ composite electrodes were investigated as anode materials using X-ray diffractometry, scanning electron microscopy, galvanodynamic and galvanostatic polarization method, and A.C. impedance spectroscopy. For the purpose of this study, LSM and LSC perovskites were fabricated in powders by the co-precipitation method. LSM/YSZ and LSC/YSZ composite electrodes were deposited on 8 mol% YSZ electrolyte disks by means of a silk screen printing method, followed by sintering at temperatures above 900 and 1,100 ℃, respectively. From the experimental results, it is concluded that the electrochemical properties of LSM/YSZ and LSC/YSZ composite electrodes are closely related to their micro-structure with TBP-sites and operating electrolysis temperatures. |
