超级电容器
纳米孔
电化学
电极
扫描电子显微镜
透射电子显微镜
材料科学
纳米结构
化学工程
循环伏安法
纳米技术
水平扫描速率
化学
电容
复合材料
工程类
物理化学
作者
Surendra K. Shinde,Monali B. Jalak,Gajanan Ghodake,Nagesh Maile,Vijay S. Kumbhar,D.S. Lee,V. J. Fulari,D.-Y. Kim
标识
DOI:10.1016/j.apsusc.2018.10.100
摘要
In this paper, we synthesized several nanostructures, including nanoflakes-, nanosheets-, and nanopetals-like NiCo2S4 flexible electrodes on a flexible stainless-steel substrate, by using successive ionic layer adsorption and reaction method for high-performance supercapacitor application. The as-prepared NiCo2S4 electrodes were structurally and morphologically characterized by X-ray diffraction (XRD), field emission scanning electron (FE-SEM) microscopy, transmission electron (TEM) microscopy, and the supercapacitance evaluated using electrochemical measurements. The nanoporous, three-dimensional interconnected nanosheets-like NiCo2S4 arrays are excellent candidate electrodes for supercapacitor application, demonstrating a high specific capacitance, and long time charge/discharge ability. The calculated values of specific capacitance shows the number of deposition cycles influences the surface morphology, which is confirmed by the FE-SEM and electrochemical testing, displaying a capacitance of 766, 1076, and 921 F g−1, for 5, 9, and 14 cycles, respectively. The supercapacitor performance confirmed the size of the nanoflakes is appropriate to prepare NiCo2S4 electrodes for high-rate electrochemical supercapacitive energy storage devices.
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