【作者】 张杰； 张文强； 于波； 柯扬船；

【Author】 Zhang Jie~(1,2),Zhang Wenqiang~1,Yu Bo~(1*),Ke Yangchuan~2(1.Institute of Nuclear and New Energy Technology, Tsinghua University,Beijing 100084,China 2.State key laboratory of heavy oil processing,College of Chemical Engineering, China University of Petroleum,Beijing 102200,China)

【机构】 清华大学核能与新能源技术研究院； 中国石油大学(北京)化学工程学院重质油国家重点实验室；

【摘要】 采用低温自蔓延法合成了Ba_xSr_1-xCo_0.8Fe_0.2O_3-δ（x=0.1,0.2,0.3……0 9,BSCF）系列粉体,利用XRD、FT-IR、SEM、HTEM和EDS等对粉体结构和形貌进行了表征。并对BSCF系列材料的电导率,氧电极性能,以及制氢性能进行了研究。结果表明:合成的Ba_xSr_1-xCo_0.8Fe_0.2O_3-δ材料粒径均匀,除Ba_0.8Sr_0.2Co_0.8Fe_0.2O_3-δ和Ba_0.9Sr_0.1Co_0.8Fe_0.2O_3-δ外均形成良好的钙钛矿结构。其中Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ性能较为稳定,其电导率在500～1000℃范围内高于40 S·cm^-1,满足SOEC电极材料的要求;采用Sm_0.8Ce_0.2O_1.9（SDC）作为夹层材料有效地改善了BSCF电极与YSZ电解质高温下的化学兼容性,在850℃下极化阻抗为0.14Ω·cm^-2,低于常用的其它氧电极材料。以BSCF作为氧电极材料辅助SDC夹层的电解池性能显著优于常规LSM氧电极,显示出良好的应用前景。更多还原

【Abstract】 Series of Ba_xSr_1-xCo_0.8Fe_0.2O_3-δ（x = 0.1,0.2,0.3……0.9） powder were synthesized via the method of low-temperature self-propagating,and characterized by XRD, FT-IR,SEM,HTEM and EDS.The crystal structure,chemical composition and electrochemical properties of BSCF were investigated in detail.The results showed that Ba_xtSr_1-xCo_0.8Fe_0.2O_3-δhad good perovskite structure expect Ba_0.8Sr_0.2Co_0.8Fe_0.2O_3-δ and Ba_0.9Sr_0.1Co_0.8Fe_0.2O_3-δ.Compared with other materials,Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ was more stable, and its conductivity is about 40 S·cm^-1 in the range of 500～1000℃,which met the requirements of SOEC electrode materials. Sm_0.2Ce_0.8O_1.9（SDC） was used as a barrier interlayer between Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ（BSCF） anode and 8YSZ electrolyte to avoid solid state interaction of solid oxide electrolysis cells （SOEC） for high temperature application.ASR data of BSCF-SDC/YSZ was 0.14 Q·cm^-2 at 850℃,which was lower than that of traditional material LSM and indicated that BSCF could be a very promising candidate for the practical application of SOEC technology in the future.更多还原