掺杂Ce基Ce_(0.8)Sm_xY_(0.2-x)O_(1.9)(0≤x≤0.2)电解质的电性能  

Electrical properties of co-doped ceria electrolyte Ce_(0.8)Sm_xY_(0.2-x)O_(1.9)(0≤x≤0.2)

作　　者：葛林[1] 周明[1] 李瑞锋[1] 郭露村[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2012年第3期14-19,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省普通高校研究生科研创新计划资助项目(CXZZ11_0324);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：采用固相反应法制备Ce0.8SmxY0.2-xO1.9Zn0.01(0≤x≤0.2)电解质试样。着重考察不同掺杂配比对材料整体导电性能的影响,另外ZnO对材料电性能的影响也进行了探讨。采用X线衍射(XRD)、Archimede排水法、热膨胀测量法和交流阻抗分析对试样的性能进行表征。结果表明:Sm和Y共掺杂能提高CeO2基电解质的电性能。其中1 550℃烧结的Ce0.8Sm0.18Y0.02O1.9在300～700℃具有最高的离子电导率。添加ZnO可以有效地降低烧结温度,在1 500℃所有试样均烧结致密。ZnO的加入可以提高材料的晶界电性能。Samples of Ce0.8SmxY0.2-xO1.9ZnO0.01（0≤x≤0.2） were synthesized by solid reaction process.The effect of dopant content to the total electrical conductivity of materials and the role of ZnO were investigated.The samples were characterized by X-ray diffractometer,Archimed method,thermal expansion measurement,and AC impedance analysis.Results showed the co-doping of Sm and Y could improve the electrical conductivity of ceria-based electrolyte.The highest ionic conductivity during 300-700 ℃ was obtained when Ce0.8Sm0.18Y0.02O1.9 was sintered at 1 550 ℃.The addition of small amounts of ZnO could lower the sintering temperature and all of the samples were densified at 1 450 ℃.The addition of ZnO could improve the grain boundary conductivity.

关 键 词：固体氧化物燃料电池 电解质 共掺杂CeO2 ZnO 烧结性能 离子电导率 

分 类 号：TM911[电气工程—电力电子与电力传动]