Vertically oriented Ni3S2/RGO/Ni3S2 nanosheets on Ni foam for superior supercapacitors

被引：44

作者：

Zhao, Chongjun ^{[1
]}

Zhang, Zhuomin ^{[1
]}

Wang, Qian ^{[1
]}

Min, Shudi ^{[1
]}

Qian, Xiuzhen ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 78期

基金：

中国国家自然科学基金;

关键词：

HIGH-PERFORMANCE SUPERCAPACITOR; ONE-POT SYNTHESIS; NICKEL FOAM; HYDROTHERMAL SYNTHESIS; ELECTROCHEMICAL PROPERTIES; ULTRAHIGH CAPACITANCE; NANOSTRUCTURED NI3S2; GRAPHENE SHEETS; SULFIDE; ARRAYS;

D O I：

10.1039/c5ra08701e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A unique sandwich structure of Ni3S2/RGO/Ni3S2 consisting of Ni3S2 nanosheets was designed and constructed on nickel foam (NF) by a one-step hydrothermal process. The lower Ni3S2 layer was converted in situ from the Ni foam substrate, while the upper Ni3S2 layer with vertical nanosheets resulted from Ni2+ ions in the solution. This Ni3S2/RGO/Ni3S2/NF nanocomposite was directly utilized as a supercapacitor electrode, which possessed a high areal mass loading of 5.2 mg cm(-2), and superior performance: a specific capacitance of up to 16.82 F cm(-2) (i.e., 3234.62 F g(-1)) at a current density of 20 mA cm(-2) (3.85 A g(-1)) and 90% retention of the initial capacitance after 1000 cycles at the high rate of 100 mA cm(-2) (19.23 A g(-1)).

引用

页码：63528 / 63536

页数：9

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