Ionic conductivity investigation in samarium and strontium co-doped ceria system
Effects of strontium doping on ionic conductivity of Sm2O3-doped ceria (samarium-doped ceria (SDC)) were investigated. The distribution and average radius of oxygen vacancies by co-doping divalent and trivalent cations were calculated from a hard-sphere model. Experimental results exhibit that the best conductivity for Ce0.78Sm0.2Sr0.02O1.88 (0.061Scm-1) specimen is twice that of Ce0.8Sm0.2O1.9 (0.0371Scm-1) at 800℃. A decrease of 50℃ in the working temperature of SDC was developed by modifying the dopant concentration, average binding energy and ionic radius of the dopant. The results confirm the Sm3+ and Sr2+ co-doped ceria material as a potential electrolyte for intermediate-temperature solid oxide fuel cell applications.
Tsung-Her Yeh Chen-Chia Chou
Advanced Ceramics Laboratory, Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan-10672, Republic of China
国际会议
第二届功能原料国际研讨会(The 2rd International Symposium on Functional Materials)
杭州
英文
303-307
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）