摘要
采用溶胶-凝胶燃烧法合成出Sr_2Fe_(1.4)Mn_(0.1)Mo_(0.5)O_(6-δ)(SFMn0.1M)材料,并将其作为中温固体氧化物燃料电池的阳极.表征了SFMn0.1M材料的晶体结构、微观形貌、元素价态、电导率和电化学性能.X射线衍射表明Mn取代后,SFMn0.1M依然保持了立方钙钛矿结构,扫描电子显微镜观察到其微观形貌为三维多孔结构.SFMn0.1M作为SOFCs阳极显示出优异的电化学性能,在800℃下SFMn0.1M的电导率为14.7S·cm^(-1),以SFMn0.1M为阳极材料组装单电池,H_2作为燃料,其最大功率密度在800,750,700和650℃下分别为565.2,385.2,303.9和141.2mW·cm^(-2).因此,SFMn0.1M在作为IT-SOFC阳极材料时表现出巨大的潜力.
In this paper,a material Sr2Fe1.5Mo0.5O6-δ(SFMn0.1M)was synthesized by a sol-gel combustion method and taken as anode materials for intermediate temperature solid oxide fuel cells(IT-SOFCs).The crystal structure,microstructure,element valence,conductivity and electrochemical properties of SFMn0.1Mwere characterized.The results of X-ray diffraction(XRD)show that,Mndoped SFMn0.1Mstill possesses pure perovskite crystal structure and the 3Dinterconnected network microstructure composed of nano-particles.The results of electron microscope(SEM)scanning reveal the interconnected porous structure of SFMn0.1M.In addition,SFMn0.1M exhibits excellent electrochemical performance with the highest conductivity of 14.7S·cm^-1 at 800℃;and the peak power densities of single cells based on the SFMn0.1Manode can reach 565.2,385.2,303.9and 141.2mW·cm^-2 at 800,750,700and 650℃,respectively.All these results show that SFMn0.1Mmaterial is a promising anode for IT-SOFCs.
作者
苟曼莉
张继方
王振华
孙旺
乔金硕
孙克宁
GOU Man-li;ZHANG Ji-fang;WANG Zhen-hua;SUN Wang;QIAO Jin-shuo;SUN Ke-ning(Beijing Key Laboratory for Chemical Power Source and Green Catalysis,School of Chemical Engineering and Environmental,Beijing Institute of Technolog)
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2018年第8期874-880,共7页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(21576028
21376001
21506012)