摘要
采用溶胶-凝胶法分别制备出PrBa0.85Ca0.15CoMO 5+δ(M=Co,Fe,Mn,Ni,Cu)阴极材料,通过X射线衍射(XRD)、扫描电镜(SEM)、直流四探针法、热膨胀系数(TEC)测试的手段对样品进行了表征。结果表明:溶胶-凝胶法制备的PBCCM(M=Co,Fe,Mn,Ni,Cu)均为双钙钛矿结构,阴极粉体颗粒小而且分布均匀。在温度400-800℃的测试条件下,PBCCM(M=Co,Cu,Fe)的电导率随着温度的升高而减小,表现出类金属导电机理。掺杂Cu的阴极材料的电导率在400℃最大达到451 S/cm。Mn,Ni,Cu元素的掺杂都能明显地降低PBCCM系阴极材料的热膨胀系数。
PrBa0.85Ca0.15CoMO5+δ(M=Co,Fe,Mn,Ni,Cu)cathode materials were prepared by sol-gel method,and these samples were measured by X-ray diffractometry(XRD),scanning electron microscopy(SEM),four-probe DC method,and thermal expansion coefficient(TEC).The results show that PBCCM(M=Fe,Mn,Ni,Cu)prepared by sol-gel method is a single perovskite structure and the cathode powders are small and uniformly distributed.The conductivity of PBCCM(M=Co,Cu,Fe)decreases with temperature increasing under the test conditions of 400-800℃,showing a metal-like conductivity mechanism.The conductivity of the cathode material doped with Cu can reach 451 S/cm at 400℃.The thermal expansion coefficient of PBCCM cathode materials doped with Mn,N,and Cu can be reduced obviously.
作者
李向国
李松波
安胜利
张帆
LI Xiang-guo;LI Song-bo;AN Sheng-li;ZHANG Fan(School of Chemistry and Chemical Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,Inner Mongolia,China;School of Metallurgical and Material Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,Inner Mongolia,China)
出处
《化学工程》
CAS
CSCD
北大核心
2019年第12期22-26,共5页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(51474133)
内蒙古自然科学基金资助项目(2017MS0218)
关键词
阴极材料
溶胶-凝胶法
双钙钛矿
电导率
热膨胀
cathode material
sol-gel method
perovskite
conductivity
thermal expansion coefficient
