Preparation and electrochemical performance of double perovskite La_2CoMnO_6 nanofibers

Jie Fu;Heng-yan Zhao;Jie-run Wang;Yu Shen;Ming Liu;College of Environmental and Chemical Engineering,Dalian Jiaotong University;  

Through electrospinning,La_2Co Mn O_6 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 La_2Co Mn O_6 nanofibers are stable,one-dimensional structures formed from interconnected La_2Co Mn O_(6 )nanoparticles with a diamond-like crystal structure.The specific surface area of the fibers is 79.407 m~2·g~(-1).Electrochemical performance tests with a three-electrode system reveal the specific capacitance of the La_2Co Mn O_6 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.

【Fund】： financially supported by the Natural Science Foundation of Liaoning Province China (No.201602113);; the Scientific Research Project of Liaoning Education Department (No.L2013177);; the National Natural Science Foundation of China (No.21106012)
【CateGory Index】： TM53

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