Y2O3 and MgO co-doped ceria based electrolytes |
| |
| Authors: | Feng-Yun Wang Soofin Cheng Chen-Hung Chung Ben-Zu Wan |
| |
| Institution: | (1) Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan;(2) Department of Chemistry, Foshan University, Foshan, 528000, P.R.China;(3) Department of Chemical Engineering, National Taiwan University, Taipei, 106, Taiwan |
| |
| Abstract: | Electrolytes of Ce1-x-y
Y
x
Mg
y
O2-0.5x-y
were prepared with citrate method and were characterized by inductively coupled plasma-atomic emission spectrometry, energy dispersive spectrometry, powder X-ray diffraction, and impedance spectroscopy. The effect of composition on the structure, conductivity, and stability of the electrolytes were investigated. When 0≤x≤ about 0.2 and 0≤y≤ about 0.05, the electrolytes were all single phase materials of ceria-based solid solution. However, when y> about 0.05, the electrolytes became two-phase materials, Y3+ and Mg2+ co-doped ceria-based solid solution and free MgO. The sample with nominal composition of Ce0.815Y0.065Mg0.12O2-d
showed ionic conductivity at 973 K close to or even a little higher than that of similarly prepared Ce0.9Gd0.1O1.95, but had lower cost of raw materials and a little better stability in reducing atmosphere. The existing of free MgO improved the stability of the electrolytes in reducing atmosphere, but too much free MgO reduced the conductivity. |
| |
| Keywords: | Solid electrolyte Co-doped ceria MgO Y2O3 Conductivity |
| 本文献已被 SpringerLink 等数据库收录！ |
|
