Porous Co3S4@Ni3S4 heterostructure arrays electrode with vertical electrons and ions channels for efficient hybrid supercapacitor
By Zhiyong Gao, Jiuli Chang, Liming Chen, Panyue Wang, Dapeng Wu, Fang Xu, Kai Jiang. Chemical Engineering Journal, 2018
181 citations recorded by the source corpus.
Abstract 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 (CA) of 3.6 F cm−1 at 0.8 mA cm−2 and 80% initial CA 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.
Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/35f147dd64112a7f87f305378cc3f1a24c66767a
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Citations in the corpus
- MOF-derived hierarchical core-shell hollow iron-cobalt sulfides nanoarrays on Ni foam with enhanced electrochemical properties for high energy density asymmetric supercapacitors (2019, background): “sulfide [13], nickel sulfide [14], and their compounds [15] for supercapacitors.”