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Chemical synthesis of 3D copper sulfide with different morphologies for high performance supercapacitors application

机译：高性能超级电容器应用的三维硫化铜硫化铜的化学合成

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3D copper sulfide (Cu _(2) S) with different morphologies for high performance supercapacitors were synthesized via a simple, cost effective successive ionic layer adsorption and reaction (SILAR) method. Further, these Cu _(2) S nanostructure demonstrate excellent surface properties like uniform surface morphology, large surface area of Cu _(2) S samples. X-ray diffraction (XRD) X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy of these samples confirmed the crystallinity and crystal structure of Cu _(2) S. The electrochemical studies of Cu _(2) S samples have been investigated by cyclic voltammetry, charge–discharge and electrochemical impedance spectroscopy techniques. The maximum specific capacitance of flower-like and integrated nanotubes samples are found 761 and 470 F g ~(?1) , respectively, at a scan rate of 5 mV s ~(?1) . The electrodes are prepared using a simple four-beaker SILAR system at ambient conditions, thus providing an easy approach to fabricate high-power and high-energy supercapacitors. Further, EIS analysis shows a lower ESR value, high power performance, excellent rate as well as frequency response to flower-like Cu _(2) S sample. The Ragone plot shows better power and energy densities of all Cu _(2) S nanostructured samples. The long-term cycling performance of Cu _(2) S is examined with excellent retention of 95%. The high surface area provided by the porous and more conductive 3D nickel foam have been utilized properly to enhance the electrochemical properties of copper sulfides with charge transport and storage.
机译：通过简单，经济高效的连续离子层吸附和反应（Sill）方法，合成了具有不同形态的3D硫化铜（Cu _（2）S）具有不同的高性能超级电容器的形态。此外，这些Cu _（2）的纳米结构表现出优异的表面性质，如均匀的表面形态，Cu _（2）S样品的大表面积。这些样品的X射线衍射（XRD）X射线光电子谱（XPS）和拉曼光谱证实了Cu _（2）S的结晶度和晶体结构。已经研究了Cu _（2）S样品的电化学研究循环伏安法，充放电和电化学阻抗谱技术。花样和集成纳米管样品的最大特定电容分别以5mV S〜（α1）的扫描速率分别发现761和470f g〜（α1）。在环境条件下使用简单的四烧杯Sill系统使用简单的四烧杯系统制备电极，从而提供了一种简单的方法来制造大功率和高能量超级电容器。此外，EIS分析显示了较低的ESR值，高功率性能，优异的速率以及对花样Cu _（2）S样品的频率响应。 RAGONE图显示了所有Cu _（2）S纳米结构样品的更好的功率和能量密度。 Cu _（2）S的长期循环性能被检查95％的优异保留。通过多孔和更多导电3D镍泡沫提供的高表面积已被适当地利用，以增强硫化铜的电化学性能和储存。

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