Porous Co3S4@Ni3S4 heterostructure arrays electrode with vertical electrons and ions channels for efficient hybrid supercapacitor

被引：179

作者：

Gao, Zhiyong ^{[1
]}

Chen, Chen ^{[1
]}

Chang, Jiuli ^{[1
]}

Chen, Liming ^{[1
]}

Wang, Panyue ^{[1
]}

Wu, Dapeng ^{[1
]}

Xu, Fang ^{[1
]}

Jiang, Kai ^{[2
]}

机构：

[1] Henan Normal Univ, Sch Chem & Chem Engn, Henan Key Lab Boron Chem & Adv Energy Mat, Xinxiang 453007, Henan, Peoples R China

[2] Henan Normal Univ, Sch Environm, Xinxiang 453007, Henan, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2018年 / 343卷

关键词：

Core-sheath structure; Sulfide; Faradic; Asymmetric supercapacitor; Areal capacitance; CARBON-FIBER PAPER; HIGH-PERFORMANCE; COBALT SULFIDE; ASYMMETRIC SUPERCAPACITORS; NI FOAM; ELECTROCHEMICAL PERFORMANCE; HYDROTHERMAL METHOD; NANOSHEET ARRAYS; NANOROD ARRAYS; ENERGY DENSITY;

D O I：

10.1016/j.cej.2018.03.042

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Faradic electrodes with large specific surface areas, efficient electrons/ions migration channels and high redox activities are essential prerequisites for high performance supercapacitors. Herein, highly porous Co3S4@Ni3S4 heterostructure arrays were prepared onto Ni foam substrate by a facile two-step hydrothermal route for application as supercapacitor electrode. Because of the novel core-sheath heterostructure with vertically aligned porous nanowires arrays and macroporous channels, the Co3S4@Ni3S4 electrode can offer high electrons/ions mobilities and large specific surface area, therefore enables an areal capacitance (C-A) of 3.6 F cm(-1) at 0.8 mA cm(-2) and 80% initial C-A maintaining ratio undergoes 5000 consecutive charge-discharge cycles. When used as positive electrode of hybrid supercapacitor, the lightweight Co3S4@Ni3S4//porous carbon hybrid supercapacitor delivers an areal capacitance of 0.513 F cm(-2) at 2 mA cm(-2) and moderate rate capability, therefore can deliver areal energy densities of 0.19-0.021 mWh cm(-2) within areal power density range of 1.72-38.4 mW cm(-2), good cycleability and slow self-discharge behavior. The current Co3S4@Ni3S4 heterostructure arrays electrode paves a feasible avenue to improve the capacitive performances of supercapacitors through construction of hierarchically porous nanoarrays architectures.

引用

页码：572 / 582

页数：11

共 62 条

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