Hydrothermal growth of 3D graphene on nickel foam as a substrate of nickel-cobalt-sulfur for high-performance supercapacitors

	Hydrothermal growth of 3D graphene on nickel foam as a substrate of nickel-cobalt-sulfur for high-performance supercapacitors
	Peishuang Miao; Jian He; Zhiyuan Sang; Fengrui Zhang; Jingdong Guo; Dong Su; Xiao Yan; Xiaolei Li; Huiming Ji.
刊名	Journal of Alloys and Compounds
	2018
文献子类	期刊论文
英文摘要	A facile and efficient one-step hydrothermal approach is presented to prepare a three-dimensional graphene-nanosheets/nickel foam (3D NF/G) substrate for pseudocapacitive materials to utilize its high specific surface area and short ion channel lengths. Scanning electron microscope (SEM) observation shows thin graphene nanosheets (~10 nm) are assembled into 3D porous architectures and uniformly deposited on NF for the NF/G substrate obtained under addition of KOH at low graphene oxide (GO) concentration. Raman and X-ray photoelectron spectroscopy (XPS) analysis further shows the homogenous dispersion of GO in the solution increases reducibility of graphene and avoids agglomeration of nanosheets during the hydrothermal process, which accelerate the graphene nanosheets selfassemble into 3D interconnected structures on NF. Furthermore, flower-like Ni-Co-S nanosheets was then deposited on NF/G substrate by electrodeposition to form NF/G/Ni-Co-S composite, in which 3D graphene can guarantee the high utilization of electroactive species and favorable reaction kinetics. The as-synthesized electrode shows greatly improved electrochemical performances with an ultrahigh specific capacitance of 2526 F g 1 at a current density of 2 A g 1 and of 1916 F g 1 even at a current density of 10 A g 1. Additionally, it also exhibits superior cycle stability by retaining 77.0% of its original state after 2000 cycles at high current density of 20 A g 1, indicating promising applications as an efficient electrode for supercapacitors.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/11541]
专题	深圳先进技术研究院_南沙所
作者单位	Journal of Alloys and Compounds
推荐引用方式 GB/T 7714	Peishuang Miao,Jian He,Zhiyuan Sang,et al. Hydrothermal growth of 3D graphene on nickel foam as a substrate of nickel-cobalt-sulfur for high-performance supercapacitors[J]. Journal of Alloys and Compounds,2018.
APA	Peishuang Miao.,Jian He.,Zhiyuan Sang.,Fengrui Zhang.,Jingdong Guo.,...&Huiming Ji..(2018).Hydrothermal growth of 3D graphene on nickel foam as a substrate of nickel-cobalt-sulfur for high-performance supercapacitors.Journal of Alloys and Compounds.
MLA	Peishuang Miao,et al."Hydrothermal growth of 3D graphene on nickel foam as a substrate of nickel-cobalt-sulfur for high-performance supercapacitors".Journal of Alloys and Compounds (2018).