X射线光电子能谱
复合数
超级电容器
循环伏安法
材料科学
石墨烯泡沫
拉曼光谱
纳米技术
复合材料
化学工程
电化学
化学
电极
石墨烯
物理化学
光学
物理
工程类
氧化石墨烯纸
作者
Yingzhen Yang,Weikun Li
标识
DOI:10.1080/1536383x.2022.2154756
摘要
The growth of NiCo-LDH/CoNi2S4/rGO composite on Ni foam was achieved with a simple one-step hydrothermal method. The obtained binder-free electrode (NiCo-LDH/CoNi2S4/rGO/Ni foam) was characterized with X-ray diffraction (XRD), field emission microscopy (FE-SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV) and galvanostastic charge/discharge (GCD). NiCo-LDH/CoNi2S4/rGO/Ni foam demonstrates a unique morphology with nanoparticles and nanowires mingled together, which endows the electrode large surface area as verified by the Brunauer–Emmett–Teller gas sorptometry measurement (BET). NiCo-LDH/CoNi2S4/rGO/Ni foam possesses excellent charge storage capabilities such as high areal capacitance, long cycling life and good rate performance. The asymmetric supercapacitor (ASC) with NiCo-LDH/CoNi2S4/rGO/Ni foam and activated carbon (AC) as positive and negative electrodes was assembled, characterized and successfully applied in practical applications, further confirming the great prospect of NiCo-LDH/CoNi2S4/rGO/Ni foam in energy storage.
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