Ta掺杂对BaCe_(0.8)In_(0.1)Y_(0.1)O_(3-δ)电解质材料性能的影响  

The Influence of Doping Ta on the Properties of BaCe_(0.8)In_(0.1)Y_(0.1)O_(3-δ) Electrolyte

作　　者：苏金瑞[1] 南怡晨 何豪[1] 赵莹莹[1] 

机构地区：[1]郑州大学物理工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2017年第3期30-34,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(51371160;11104253)

摘　　要：采用柠檬酸盐燃烧法和固相反应相结合的方法制备BaCe_(0.8)In_(0.1)Y_(0.1)O_(3-δ)(BCIY)和掺杂Ta的BaCe_(0.7)Ta_(0.1)In_(0.1)Y_(0.1)O_(3-δ)(BCTIY)电解质粉体,在200 MPa压力下干压成型后在不同温度下烧结成电解质片,并使用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和电化学工作站分别对样品的物相、微观结构和电导率进行了表征.XRD结果显示,1 000℃煅烧5 h的BCIY和BCTIY均表现出单一的钙钛矿相.收缩率和SEM结果显示,BCIY在1 250℃下就可以烧结致密,掺杂Ta的BCTIY在1 350℃下也可以烧结致密.在空气和湿润的H_2气氛下BCTIY的电导率比BCIY的略有降低.在CO_2和沸水环境下,BCTIY比BCIY明显表现出较好的化学稳定性.研究结果表明:BCTIY有望成为中低温固体氧化物燃料电池稳定的电解质材料.The BaCe0.8In0.1Y0.1O3-δ （ BCIY ） and Ta doped BaCe0.8In0.1Y0.1O3-δ（ BCTIY ） electrolyte pow- ders were successfully synthesized by citrate combustion and solid phase reaction method in this paper. Under the 200 MPa pressure dry-pressing molding, the electrolyte flakes were obtained by sintered at different tem- peratures. The phase of samples was analysed by the x-ray diffraction （XRD） ; the microstructure was ob- tained by scanning electron microscope （SEM）. The electrochemical performance was measured by the elec- trochemical workstation. The characterization of XRD, SEM and electrochemical workstation demonstrated BCIY and BCTIY both with a single perovskite structure after 5 h at 1 000℃ calcination. Moreover, BCIY and BCTIY Could be dense sintered under 1250℃ and 1 350℃, respectively. In addition, the conductivity of BCTIY is a little smaller than that of BCIY in the air and humid H2. Meanwhile, the chemical stability of BC- TIY is superior to that of BCIY in CO2 and boiling water environment. These results indicated that BCTIY could be stable electrolyte materials applied in intermediate temperature solid oxide fuel cells.

关 键 词：质子导体 固体氧化物燃料电池 BaCe0.8In0.1Y0.1O3-δ BaCe0.7Ta0.1In0.1Y0.1O3-δ 烧结活性 化学稳定性 电导率 

分 类 号：TM911[电气工程—电力电子与电力传动]