固体氧化物燃料电池电解质材料Ce0.8Sm0.2-xCuxO1.9-δ的制备与性能研究  

Preparation and Properties of Solid Oxide Fuel Cell Electrolyte Material Ce0.8Sm0.2-xCuxO1.9-δ

作　　者：邵凌波 田长安[1,3] 梁升 王亚君 陈捷 阳杰 SHAO Lingbo;TIAN Changan;LIANG Sheng;WANG Yajun;CHEN Jie;YANG Jie(College of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, China;College of Biofood and Environment, Hefei University, Hefei 230601, China;School of Chemistry and Civil Engineering, Shaoguan University, Shaoguan 512005, China)

机构地区：[1]合肥学院能源材料与化工学院,合肥230601 [2]合肥学院生物食品与环境学院,合肥230601 [3]韶关学院土木工程学院,韶关512005

出　　处：《硅酸盐通报》2020年第5期1608-1613,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51902079);安徽省自然科学基金(1708085ME112);安徽高校自然科学研究重点项目(KJ2018A0549)。

摘　　要：以硝酸铈、硝酸铜、硝酸钐为原料,柠檬酸为络合剂,采用溶胶-凝胶法制备了固体氧化物燃料电池(SOFCs)电解质材料Ce0.8Sm0.2-xCuxO1.9-δ(x=0、0.02、0.04、0.08、0.12、0.16、0.20),并通过红外光谱(FTIR)、X射线衍射(XRD)、扫描电子显微镜(SEM)、交流阻抗(AC)等技术对样品进行了分析表征。结果表明,采用溶胶-凝胶法经600℃煅烧所得粉体呈现出单相的立方萤石结构,超细粉体Ce0.8Sm0.2-xCuxO1.9-δ具有较高的烧结活性。经1500℃烧结3 h后得到的Ce0.8Sm0.2-xCuxO1.9-δ系列电解质陶瓷,其相对密度均大于95%。电化学性能研究表明,Sm、Cu双掺杂可以提高CeO2基电解质的性能。其中,Ce0.8Sm0.18Cu0.02O1.89电导率最大,在800℃时达到0.06 S/cm,活化能为0.33 eV。The solid oxide fuel cells(SOFCs)electrolyte material Ce0.8Sm0.2-xCuxO1.9-δ(x=0,0.02,0.04,0.08,0.12,0.16,0.20)were prepared with Ce(NO3)3·6H2O,Cu(NO3)2·3H2O,Sm(NO3)3·6H2O as the raw material and C6H8O7·H2O as a complex agent,by sol-gel method.which were analyzed and characterized through Fourier-transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),scanning electron microscope(SEM),AC impedance(AC)and other technologies.The results show that the single-phase cubic fluorite structure,superfine powder Ce0.8Sm0.2-xCuxO1.9-δ,which appears very high sintering activity after the calcination by the sol-gel method.The relative density of the Ce0.8Sm0.2-xCuxO1.9-δtypes electrolyte ceramic produced by calcining for 3 h at the temperature of 1500℃is greater than 95%.Electrochemical performance studies prove that Sm and Cu double doping improve the performance of CeO2-based electrolytes.Ce0.8Sm0.18Cu0.02O1.89 is one of the electrolyte ceramics that has the maximum conductivity rate,which reaches 0.06 S/cm and an activation rate of 0.33 eV at 800℃.

关 键 词：溶胶-凝胶法 CeO2基电解质 电导率 双掺杂 

分 类 号：TM911[电气工程—电力电子与电力传动]