摘要
为提高SOFCs阳极材料的性能,选取SFM作为SOFCs阳极材料,并对该材料进行A位掺杂,选取Ca^(2+)作为掺杂元素,通过溶胶-凝胶法制备不同掺杂量的SCaxFM粉末,采用丝网印刷将阴极浆体涂刷至GDC电解质两侧,在空气中1200℃灼烧2.5 h得到阴极电极,阳极浆体采用相同方法得到阳极电极。电极集流体均以银浆为媒介,于电炉800℃灼烧使银浆与电极充分结合,利用导电胶把单电池密封于管Al2O3,外接银线形成闭合回路,采用交流阻抗谱仪进行电化学测试。结果显示,当Ca离子掺杂量为0.1时,FCaxFM具有较高的Mo^(5+)/Mo^(6+)比和最大的晶格氧空位浓度,其所表现出的阳极极化阻抗值最小,在温度为800℃时为0.020Ω·cm^(2),更接近于原结构,维持性较好。
In order to improve the performance of SOFCs anode materials,SFM was selected as the anode material of SOFCs,and A-site doping was carried out on the material.Ca^(2+)was selected as the doping element,and SCaxFM powders with different doping levels were prepared by the sol-gel method.The cathode paste was coated on both sides of the GDC electrolyte by screen printing,and the cathode electrode was obtained by burning in air at 1200℃for 2.5 hours.The anode paste was obtained by the same method.The electrode collecting fluid uses silver paste as the medium,which is fully combined with the electrode when it is burned at 800℃in the electric furnace.The conductive adhesive is used to seal the single battery with the Al2O3tube,and the silver wire is connected externally to form a closed loop.The electrochemical test is carried out using an AC impedance spectrometer.The results show that FCaxFM has a high Mo^(5+)/Mo^(6+)ratio and a maximum lattice oxygen vacancy concentration when the Ca ion doping amount is 0.1.The anodic polarization impedance of FCaxFM is the smallest,and it is 0.020Ω·cm^(2)at 800℃,which is closer to the original structure and has good maintenance.
作者
邱丽琴
QIU Li-qin(Ceramic Engineering Department,Quanzhou Vocational College of Arts and Crafts,Quanzhou 362500,Fujian,China)
出处
《贵阳学院学报（自然科学版）》
2022年第4期100-104,共5页
Journal of Guiyang University：Natural Sciences
基金
2021年度福建省中青年教师教育科研项目(科技类)“Ca掺杂SFM作为SOFC阳极材料的性能分析”(项目编号:JAT210939)。
