Physicochemical properties of proton-conducting SmNiO3 epitaxial films

作     者：Xing Xu Chen Liu Jing Ma Allan J.Jacobson Cewen Nan Chonglin Chen 

作者机构：School of Material Science and EngineeringTsinghua UniversityBeijing100086China Department of Chemistry and Texas Center for SuperconductivityUniversity of HoustonHoustonTX77204USA Department of Physics and AstronomyUniversity of Texas at San AntonioSan AntonioTX78249USA 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2019年第5卷第2期

页      面：247-251页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Financial support by National Science Foundation of China Contract No.51672149,51332001 and 51402164 the National Basic Research Program of China(No.2016YFA0300103).AJJ acknowledges support from the R.A.Welch Foundation,Grant#E0024) 

主　　题：SmNiO_(3) Thin film Transport properties Ionic conductivity Impedance measurements 

摘      要：Proton conducting SmNiO_(3)(SNO)thin films were grown on(001)LaAlO_(3)substrates for systematically investigating the proton transport properties.X-ray Diffraction and Atomic Force Microscopy studies reveal that the as-grown SNO thin films have good single crystallinity and smooth surface *** electrical conductivity measurements in air indicate a peak at 473 K in the temperature dependence of the resistance of the SNO films,probably due to oxygen loss on heating.A Metal-Insulator-Transition occurs at 373 K for the films after annealing at 873 K in *** a hydrogen atmosphere(3%H_(2)/97%N_(2)),an anomalous peak in the resistance is found at 685 K on the first heating *** Impedance Spectroscopy studies as a function of temperature indicate that the SNO films have a high ionic conductivity(0.030 S/cm at 773 K)in a hydrogen *** activation energy for proton conductivity was determined to be 0.23 eV at 473-773 K and 0.37 eV at 773e973 K *** findings demonstrate that SNO thin films have good proton conductivity and are good candidate electrolytes for low temperature proton-conducting Solid Oxide Fuel Cells.