科研之友
微信
新浪微博
Facebook
分享链接
摘要
The influence of indium doping on chemical stability, sinterability, and electrical properties of BaCe0.5Zr0.3Y0.2O3- was investigated. The phase purity and the chemical stability of the powders in humid pure CO2 were evaluated by XRD. The dense electrolyte pellets were formed after the calcination at 1450 degrees C for 8h. SEM images and shrinkage plot showed that the sinterability of the samples was apparently improved by doping indium. The electrical conductivity was measured by impedance test through two-point method, at both low (200-350 degrees C) and high temperature ranges (450-850 degrees C) in different atmospheres. BaCe0.4Zr0.3In0.1Y0.2O3- has been proved to be the optimal composition which simultaneously maximized the chemical stability, sinterability, and electrical conductivity which reached 1.1x10(-2)S/cm in wet hydrogen at 700 degrees C, comparing with the 1.3x10(-2)S/cm for original BaCe0.5Zr0.3Y0.2O3-. Anode support fuel cell with a thin BaCe0.4Zr0.3In0.1Y0.2O3- electrolyte (15m) was fabricated by spin coating method. Maximum power density of 0.651W/cm(2) was obtained when operating at 700 degrees C and fed by humid H-2 (containing H2O 3 vol%). The obtained fuel cell could efficiently run at 650 degrees C for more than 100h without any attenuation.
- 出版日期2015-12
