EDTA溶胶-凝胶法制备SOFC复合阳极材料CuxCo1-xO-SDC的研究

摘要

为寻求能与中温电解质相匹配的阳极材料,采用EDTA溶胶-凝胶法制备了Cux Co1-x O和SDC粉体,并用压制法制备了 Cux Co1-x O-SDC素胚.利用 X射线衍射技术对粉体的性能进行了表征,XRD结果表明,CuO、Co2 O3已生成了互溶新物质 Cux Co1-x O；Cux Co1-x O 与SDC在烧结的过程中没有发生相互反应,各自成单相结构.采用直流四电极法测试了Cux Co1-x O 的电导率,结果表明其在中温条件下也具有较高电导率,其中Cu0．9 Co0．1 O-SDC阳极样品具有最高的电导率,还原后在500℃时电导率达到了1310．1 S/cm.%In order to seek anode materials matching with intermediate temperature electrolyte,Cux Co1-x O and SDC powders were prepared by EDTA sol-gel method,and the Cux Co1-x O-SDC bisques were prepared by press forming.The powders were characterized by XRD.The results show that CuO and Co2 O3 have formed new intersoluble material Cux Co1-x O;Cux Co1-x O and SDC do not react each other and keep single phase respective-ly.The conductivities of Cux Co1-x O are tested by direct current four-probe method.The results show that con-ductivity remains high at mid-temperature,and the Cu0.9 Co0.1 O-SDC after reduction has the highest conductivity of 1 310.1 S/cm at 500 ℃.