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以固相反应方法合成了碱土 (Ca ,Sr)双掺杂的氧化铈基固溶体材料Ce0 .9Ca0 .1 -xSrxO1 .9(x =0 ,0 0 4,0 0 5 ,0 0 6 ,0 1)。结构研究表明 :碱土双掺杂的CeO2 呈立方萤石结构。利用阻抗谱研究了材料的离子导电性 ,发现碱土双掺杂有利于提高材料离子导电率 ,掺杂两种碱土金属离子的等效半径接近临界离子半径时导电率最高。将此系列材料作为电解质进行了燃料电池试验 ,发现电池的输出功率高于YSZ电解质及碱土单掺杂氧化铈 ,且电池输出开路电压亦高于单掺杂的情况。
(Ca, Sr) doping cerium oxide-based solid solution materials Ce0.9Ca0.1-xSrxO1.9 (x = 0,04,05,06,01 ). Structural studies show that: alkaline earth double doping CeO2 cubic fluorite structure. The ion conductivity of the material was investigated by impedance spectroscopy. It was found that alkaline earth double doping is conducive to increasing the ionic conductivity of the material. The equivalent conductivity radius of the two alkaline earth ions doping is close to the critical ion radius and the conductivity is the highest. The series of materials as fuel cells were tested and found that the battery output power is higher than the YSZ electrolyte and alkaline earth doped ceria, and the battery output open circuit voltage is also higher than the single doping.