Ce_(0.8)Y_(0.2-x)Mg_(x)O_(2-δ)电解质材料的制备及其性能  

Preparation and properties of Ce_(0.8)Y_(0.2-x)Mg_(x)O_(2-δ)electrolyte materials

作　　者：高雅 徐泽忠 张凌云[2] 刘可 GAO Ya;XU Ze-zhong;ZHANG Ling-yun;LIU Ke(Center of Analysis and Testing,Hefei University,Hefei 230601,China;Local Service Offices,Hefei University,Hefei 230601,China;School of Energy Materials and Chemical Engineering,Hefei University,Hefei 230601,China)

机构地区：[1]合肥学院分析测试中心,合肥230601 [2]合肥学院服务地方办,合肥230601 [3]合肥学院能源材料与化工学院,合肥230601

出　　处：《哈尔滨商业大学学报（自然科学版）》2022年第4期402-405,共4页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：安徽省重点研究与开发计划项目(2019b11020040);安徽省教育厅高校科学研究项目(KJ2021A1018);合肥学院人才科研基金项目(21-22RC36)。

摘　　要：以金属硝酸盐Ce(NO_(3))_(3)、Y(NO_(3))_(3)、Mg(NO_(3))_(2)为原料,采用溶胶-凝胶法制备系列电解质材料Ce_(0.8)Y_(0.2-x)Mg_(x)O_(2-δ)(x=0、0.02、0.04、0.06、0.08、0.1),并通过扫描电镜(SEM)、X射线衍射(XRD)、电化学阻抗谱(EIS)等手段对样品进行测试表征.结果表明,电解质材料经600℃煅烧3 h后形成立方萤石结构,并具有较高的烧结活性.压制成片的电解质在1550℃下烧结仍为立方萤石结构,较为致密;电化学性能研究表明,800℃时电导率为0.039 S/cm,Ce_(0.8)Y_(0.2-x)Mg_(x)O_(2-δ)电解质材料可以作为中温固体氧化物燃料电池的候选材料.Series of electrolyte materials Ce_(0.8)Y_(0.2-x)Mg_(x)O_(2-δ)(x=0,0.02,0.04,0.06,0.08,0.1)were prepared by sol-gel method using metal nitrate Ce(NO_(3))_(3),Y(NO_(3))_(3),Mg(NO_(3))_(2)as raw materials.The samples were characterized by infrared spectroscopy(FTIR),scanning electron microscopy(SEM),X-ray diffraction(XRD)and electrochemical impedance spectroscopy(EIS).The results showed that the cubic fluorite structure was formed after calcination at 600℃for 3 h,and it has high sintering activity.When sintered at 1550℃,the pressed sheet electrolyte still exhibits a cubic fluorite structure and is relatively compact.The electrochemical properties of Ce_(0.8)Y_(0.2-x)Mg_(x)O_(2-δ)electrolyte with a conductivity of 0.039 S/cm at 800℃can be used as a candidate material for medium-temperature solid oxide fuel cells.

关 键 词：中温固体氧化物燃料电池 金属硝酸盐 溶胶-凝胶法 电解质 电导率 电化学性能 

分 类 号：O646[理学—物理化学]