电解质
共沉淀
开路电压
离子电导率
固体氧化物燃料电池
阴极
氧化物
材料科学
掺杂剂
草酸盐
兴奋剂
分析化学(期刊)
无机化学
电导率
化学工程
化学
电压
物理化学
电极
电气工程
色谱法
冶金
光电子学
工程类
作者
Shaowu Zha,Changrong Xia,Guangyao Meng
标识
DOI:10.1016/s0378-7753(02)00625-0
摘要
Two systematic electrolytes of Ce1−xGdxO2−x (GDC) and Ce1−xSmxO2−x (SDC) (x=0–0.25) were synthesized using an oxalate coprecipitation process. Dependence of a, unit cell parameter versus dopant concentration, x, of Gd3+ and Sm3+ ions show that these solid solutions obey Vegard’s rule as a=5.4121+0.0525x for GDC and a=5.4117+0.1237x for SDC, respectively. Electrical conductivity reached maximum at x=0.15 in the temperature range of 400–850 °C for both kinds of doped-ceria electrolyte membranes. A single cell was made for the measurement of open circuit voltage. The results show that the open circuit voltages are greatly influenced by ionic transference number of the electrolyte, gaseous fuel composition and cathode membrane material.
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