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文章编号： 1672-6987（2020）04-0076-06； DOI： 10.16351/j.1672-6987.2020.04.011
封常乾1， 隋静1*， 杨鹏2， 隋丽娜1
（1.青岛科技大学 材料科学与工程学院，山东 青岛 266042；2.合肥国轩高科动力能源有限公司，安徽 合肥 230012）
摘要： 采用EDTA-柠檬酸盐改进的溶胶凝胶法成功制备出用于中温固体氧化物燃料电池（IT-SOFCs）的阴极材料GdBa0 .7Sr0 .3Co2O5+δ（GBSCO）和电解质材料Ce0 .9Gd0 .1O1 .95（GDC），使用X射线衍射仪（XRD）和扫描电子显微镜（SEM）表征了材料的晶体结构和微观结构特性。采用电化学交流阻抗谱（EIS）和线性扫描伏安法（LSV），对组装的对称半电池三电极体系的电化学性能进行了表征。实验结果表明：随着测试温度的升高，两种不同结构半电池的电化学性能均有明显提升。当测试温度为750 ℃时，半电池GBSCO//GDC的面积比界面电阻为0 .166 Ω·cm2，极化电流密度为0 .370 A·cm-2；相同温度下，半电池GBSCO//多孔GDC骨架/GDC的面积比界面电阻为0 .118 Ω·cm2，极化电流密度为0 .763 A·cm-2；后者的面积比界面电阻要比前者低0 .048 Ω·cm2，而极化电流密度要比前者高0 .393 A·cm-2。体现了GBSCO//多孔GDC骨架/GDC结构的优异性。
关键词： 中温固体氧化物燃料电池； 复合阴极； 电化学性能
中图分类号： TQ 207+.2文献标志码： A
引用格式： 封常乾， 隋静， 杨鹏， 等. 疏松多孔Ce0.9Gd0.1O1.95电解质骨架对GdBa0.7Sr0.3-Co2O5+δ阴极材料性能的影响\[J\]. 青岛科技大学学报（自然科学版）， 2020， 41（4）： 76-81.
FENG Changqian, SUI Jing, YANG Peng, et al. Effect of porous Ce0 .9Gd0 .1O1 .95 electrolyte skeleton on properties of cathode material GdBa0 .7Sr0 .3Co2O5+δ\[J\]. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2020, 41(4)： 76-81.
Effect of Porous Ce0 .9Gd0 .1O1 .95 Electrolyte Skeleton on
Properties of Cathode Material GdBa0 .7Sr0 .3Co2O5+δ
FENG Changqian1, SUI Jing1, YANG Peng2, SUI Lina1
(1.College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2.Hefei Guoxuan High-tech Power Energy Co.,Ltd., Hefei 230012, China)
Abstract: In this work, the cathode material GdBa0 .7Sr0 .3Co2O5+δ (GBSCO) and electrolyte material Ce0 .9Gd0 .1O1 .95(GDC) for intermediate-temperature solid oxide fuel cells (IT-SOFCs) have been synthesized via EDTA-citrateprocess. The crystal structure and microstructure characteristics of the materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical performances were measured with three-electrode method.Electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV) of the half-cell were carried out with CHI660D electrochemical analyzer. The experimental results show that the area specific resistance of the half-cell GBSCO//GDC is 0 .166 Ω·cm2, and the polarization current density is 0 .370 A·cm-2 at 750 ℃. At the same temperature, the area specific resistance of the half-cell GBSCO//porous GDC skeleton/GDC is 0 .118 Ω·cm2, and the polarization current density is 0 .763 A·cm-2. It was clear that the former was substantially higher than those of another half-cell. It reflects the superiority of GBSCO//porous GDC skeleton/GDC structure.
Key words: IT-SOFC; composite cathode; electrochemical property
收稿日期： 2019-07-30
基金项目： 国家自然科学基金项目(21606140).
作者简介： 封常乾（1994—），男，硕士研究生.*通信联系人.
