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Electrochemical Properties of Single-crystalline Mn3O4 Nanostructures and their Capacitive Performance in Basic Electrolyte

机译:Mn 3 O 4 单晶纳米结构的电化学性质及其在碱性电解质中的电容性能

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Single-crystalline Mn3O4 square-shaped nanostructures have been successfully synthesized byhydrothermal method without using any surfactant. The as-prepared products were characterized by X- ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Transmission electronmicroscopy (TEM) and High Resolution transmission electron microscopy (HRTEM). To assess thepotential properties of nanostructures, galvanostatic chargingischarging and cyclic voltammetrymeasurements were performed for their use in supercapacitors. The Mn3O4 nanoarchitectures used as-1 -1 supercapacitor electrode in 1mol L KOH electrolyte have a specific capacitance value of 355.5 F g-1 at a low current density of 0.35 A.g . The device still retain 85.08% of its initial capacitance-1 afterwards 2000 cycles at a current density of 5 A.g . The as-synthesized Mn3O4 nanostructuresexhibited a good rate capability and stability for electrochemical properties. These results indicate theirpotential application as electrode material for high performance supercapacitor in basic medium.
机译:在不使用任何表面活性剂的情况下,通过水热法成功地合成了单晶的Mn3O4方形纳米结构。通过X射线衍射(XRD),场发射扫描电子显微镜(FESEM),透射电子显微镜(TEM)和高分辨率透射电子显微镜(HRTEM)表征所制备的产物。为了评估纳米结构的潜在性能,进行了恒电流充电和循环伏安法测量其在超级电容器中的使用。在1mol L KOH电解质中用作-1 -1超级电容器电极的Mn3O4纳米结构在0.35 A.g的低电流密度下的比电容值为355.5 F g-1。在2000 A循环之后,该器件在5 A.g的电流密度下仍保留其初始电容-1的85.08%。合成后的Mn3O4纳米结构具有良好的速率性能和电化学性能稳定性。这些结果表明它们在碱性介质中作为高性能超级电容器的电极材料的潜在应用。

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