A facile one-step route to RGO/Ni3S2 for high-performance supercapacitors
作者： Zhuomin Zhang , Chongjun Zhao , Shudi Min , Xiuzhen Qian
DOI: 10.1016/J.ELECTACTA.2014.08.038
关键词:
摘要: Abstract A facile one-step solution-phase route to RGO/Ni3S2 on nickel foam (RGO/Ni3S2/NF) was presented. The RGO/Ni3S2/NF (RNS) nanocomposites were hydrothermal-assisted synthesized, in which acted as an auxiliary reductant of GO and S, a Ni source Ni3S2, substrate for composite film. composites characterized by X-ray diffraction (XRD), Raman spectroscopy, photoelectron spectroscopy (XPS), field-emission scanning electron microscope (FESEM), transmission microscopy (TEM). electrochemical performances the supercapacitor with as-synthesized electrodes are evaluated using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), impedance spectrometry (EIS) 2 M KOH aqueous solution. It is found that electrode exhibits superior performance (7440 mF cm−2 at 10 mA cm−2, i.e., 2188.8 F g−1 2.9 g−1), compared Ni3S2/NF (4360 10 mA cm−2) RGO/Ni(OH)2/NF (3400 prepared under identical conditions. Both temperature sulfur content play important roles controlled synthesis RNS its performance.
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