Preparation and electrochemical performance of double perovskite La2CoMnO6 nanofibers
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第8期
论文作者：Jie Fu Heng-yan Zhao Jie-run Wang Yu Shen Ming Liu
文章页码：950 - 956
摘 要：Through electrospinning,La2Co Mn O6 nanofibers were prepared from a polyvinylpyrrolidone/lanthanum nitrate–cobalt acetate–manganese acetate（PVP/LCM）precursor and were used as electrode materials.The morphologies and structures of the samples were characterized by field-emission scanning electron microscopy（FE-SEM）,transmission electron microscopy（TEM）,X-ray diffraction（XRD）,and Brunauer-Emmett-Teller（BET）specific surface area analysis.The results show that the prepared La2Co Mn O6 nanofibers are stable,one-dimensional structures formed from interconnected La2Co Mn O6 nanoparticles with a diamond-like crystal structure.The specific surface area of the fibers is 79.407 m2·g-1.Electrochemical performance tests with a three-electrode system reveal the specific capacitance of the La2Co Mn O6 nanofibers as 109.7 F·g-1 at a current density of 0.5 A·g-1.After 1000 charge-discharge cycles at a current density of 1 A·g-1,the specific capacitance maintains 90.9%of its initial value,demonstrating a promising performance of the constraint capacitance and good cyclic stability.
Jie Fu，Heng-yan Zhao，Jie-run Wang，Yu Shen，Ming Liu
College of Environmental and Chemical Engineering,Dalian Jiaotong University
摘 要：Through electrospinning,La2Co Mn O6 nanofibers were prepared from a polyvinylpyrrolidone/lanthanum nitrate–cobalt acetate–manganese acetate（PVP/LCM）precursor and were used as electrode materials.The morphologies and structures of the samples were characterized by field-emission scanning electron microscopy（FE-SEM）,transmission electron microscopy（TEM）,X-ray diffraction（XRD）,and Brunauer-Emmett-Teller（BET）specific surface area analysis.The results show that the prepared La2Co Mn O6 nanofibers are stable,one-dimensional structures formed from interconnected La2Co Mn O6 nanoparticles with a diamond-like crystal structure.The specific surface area of the fibers is 79.407 m2·g-1.Electrochemical performance tests with a three-electrode system reveal the specific capacitance of the La2Co Mn O6 nanofibers as 109.7 F·g-1 at a current density of 0.5 A·g-1.After 1000 charge-discharge cycles at a current density of 1 A·g-1,the specific capacitance maintains 90.9%of its initial value,demonstrating a promising performance of the constraint capacitance and good cyclic stability.
关键词：
