Ce_(0.8)Gd_(0.2)O_(1.9)–Co_3O_4复合电解质的制备及性能研究  

Fabrication and Performance of Ce_(0.8)Gd_(0.2)O_(1.9)–Co_3O_4 Composite Electrolytes

作　　者：李柯慧[1] 王世民[1] 徐世峰[1] 周永军[1] 徐丹[1] 

机构地区：[1]沈阳航空航天大学理学院,辽宁沈阳110136

出　　处：《科技创新导报》2015年第30期128-132,共5页Science and Technology Innovation Herald

基　　金：国家自然科学基金青年科学基金项目(51402197);辽宁省教育厅科学技术研究项目(L2013072)

摘　　要：该文通过将Gd掺杂的CeO2基电解质（GDC）与过渡族金属氧化物（CO3O4）进行复合,制备固体氧化物燃料电池电解质材料。考察CO3O4对电解质样品的微观结构和电化学性能的影响。对制备所得的复合电解质GDC-xmol%Co3O4（x=0、0.5、1、2、3）进行XRD、SEM测试,观察其微观结构变化。利用交流阻抗测试400~550℃空气气氛下不同含量的Co3O4对电解质导电性能的影响。实验结果表明：Co元素可以促进晶粒生长,提高烧结性能。阻抗谱测试表明,随着Co含量的增加,晶界导电性降低。In the present work, Co3O4 was added directly into the electrolyte ceramic Ce0.8Gd0.2O1.9（GDC）,during powder preparation to investigate the effects of the presence of Co3O4on the microstructure and electrical properties of GDC electrolyte.The structures of GDC-xmol% Co3O4（x=0,0.5,1,2,3） composite were characterized by X-ray diffraction and SEM.The electrical conductivities were investigated by AC impedance spectroscopy at 400~550oC in air atmosphere with different content of Co3O4.The experimental results show that the Co elements can promote grain growthand improve the sinteringperformance. Impedance spectroscopy tests show that with the increasing of the content of Co the grain boundary （GB） conductivity decrease.

关 键 词：Gd掺杂的氧化铈 Co3O固体氧化物燃料电池 复合电解质 导电性能 

分 类 号：TQ174[化学工程—陶瓷工业] TM911[化学工程—硅酸盐工业]