Hybrid NiCo2S4@MnO2 heterostructures for high-performance supercapacitor electrodes

Yang, Jun; Ma, Mingze; Sun, Chencheng; Zhang, Yufei; Huang, Wei; Dong, Xiaochen

doi:10.1039/c4ta05747c

Cited by 273 publications

(122 citation statements)

References 40 publications

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“…Stimulated by the remarkable electrochemical properties of NiCo2O4, spinel NiCo2S4 was explored for more striking electrochemical performance, which has become a new hotspot [8][9][10][11]. Replacing oxygen with sulphur may create a more flexible structure with the elongation of chemical bonds, thus making it easier for electrons to transport in this tuned structure, which can further contribute to the enhancement of electrochemical performances of SCs [12].…”

Section: Introductionmentioning

confidence: 98%

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

et al. 2015

Electrochimica Acta

248

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Section: Introductionmentioning

confidence: 98%

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

et al. 2015

Electrochimica Acta

248

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“…Core‐shell structure is a promising electrode configuration due to its rich redox reaction sites and sufficient contact area between electrode and electrolyte. The electrochemical performance of the core‐shell hybrid electrode could be enhanced significantly by the synergistic effect of core and shell materials . In this work, with the aim of promoting the electrochemical behavior, a ternary metal sulphide Ni‐Co‐S nanosheet was grown on the surface of MnCo 2 S 4 by a simple electrochemical deposition to form a MnCo 2 S 4 @Ni‐Co‐S (MCS@NCS) core‐shell nanostructure.…”

Section: Introductionmentioning

confidence: 99%

Double-Layer MnCo₂ S₄ @Ni-Co-S Core/Shell Nanostructure on Nickel Foam for High-Performance Supercapacitor

Tang

2018

Phys. Status Solidi A

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A double‐layer MnCo2S4@Ni‐Co‐S (MCS@NCS) core/shell nanocomposite is successfully deposited on nickel foam using a facile and simple method which includes a hydrothermal treatment and an electrochemical deposition and exhibits excellent electrochemical performance. With the introduction of sulfur via a sulfurization process, the MnCo2S4 nanorods have larger specific surface area compared to the MnCo2O4 nanorods and can serve as porous scaffolds for loading a large amount of additional active materials, facilitating electron transport and ion diffusion. The deposited Ni‐Co‐S nanosheet on MnCo2S4 can further increase the electro‐active surface area and electrical conductivity as well as reinforce the mechanical stability of the whole electrode. Combining both structural and electrochemical advantages, the electrode with MCS@NCS heterostructures has high areal capacitance (10.14 F cm−2 at 1 mA cm−2). An asymmetric supercapacitor with Ni foam‐activated carbon as the negative electrode and Ni foam‐MCS@NCS as the positive electrode is fabricated and shows remarkable high areal capacitance (1.92 F cm−2 at 1 mA cm−2) and good cycling stability (72% capacitance retention after 5000 cycles), demonstrating its great potential as an efficient energy storage device for electronic systems.

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“…1,2 Supercapacitors can be considered as promising energy storage devices with performances of both batteries and capacitors due to their high power density, long cycle lifetime, and high reliability. [5][6][7][8] In recent years, as a new kind of pseudocapacitor electrode materials, metal sulfides have been attracting increasing attention due to the higher electrical conductivity, mechanical and thermal stability compared to that of the corresponding metal oxides, as well as the rich redox chemistry. Therefore, considerable research efforts have been devoted to the design and construction of advanced supercapacitors electrodes both in component and structures.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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A unique sandwich structure of Ni 3 S 2 /RGO/Ni 3 S 2 consisting of Ni 3 S 2 nanosheets was designed and constructed on nickel foam (NF) by a one-step hydrothermal process.The lower Ni 3 S 2 layer was converted in-situ from the Ni foam substrate, while the upper Ni 3 S 2 layer with vertical nanosheets was resulted from Ni 2+ ions in the solution.This Ni 3 S 2 /RGO/Ni 3 S 2 /NF nanocomposite was directly utilized as supercapacitor electrode, which possesses 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 retention 90% of initial capacitance after 1,000 cycles at the high rate of 100 mA cm -2 (19.23 A g -1 ). crystal increase and thus the thickness increase. For comparison, when the temperature increases to 240°C, the nucleation number increase, and the Ni 3 S 2 nanoflakes primarily grow in longitudinal height rather than in thickness, as shown in shown in Fig.4a-4c. A high magnification SEM image of Fig. 4c is shown in Fig.4e, and an array structure consisting of of highly porous Ni 3 S 2 sheets is vertically packed on the top side of the RGO, which is transformed from the nickel ion in the solution, forming the upper Ni 3 S 2 layer. On the other hand, the RNS-210 composite (Fig. 4f) displays relatively loose and random nanosheets of Ni 3 S 2 that result from the surface nickel source of NF, which can be considered as the same structure of the lower layer of Ni 3 S 2 nanosheets in the NRNS-210 composite.an auxiliary oxidant for Ni. Furthermore, this in-situ redox reaction can be developed to build RGO/metal oxides composite on the active metal substrate Fig. 8 The performance of the NRNS-210 composite films as electrode materials in supercapacitors was evaluated using cyclic voltammetry (CV) and Electrochemical performances of NRNS compositeschronopotentiometry. Fig. 8a shows the CV curves of the NRNS-210 electrode in a 2

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Hybrid NiCo₂S₄@MnO₂ heterostructures for high-performance supercapacitor electrodes

Cited by 273 publications

References 40 publications

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

Double-Layer MnCo₂ S₄ @Ni-Co-S Core/Shell Nanostructure on Nickel Foam for High-Performance Supercapacitor

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

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Hybrid NiCo2S4@MnO2 heterostructures for high-performance supercapacitor electrodes

Cited by 273 publications

References 40 publications

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

High Energy Density Asymmetric Supercapacitors From Mesoporous NiCo2S4 Nanosheets

Double-Layer MnCo2 S4 @Ni-Co-S Core/Shell Nanostructure on Nickel Foam for High-Performance Supercapacitor

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

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Product

Resources

About

Hybrid NiCo₂S₄@MnO₂ heterostructures for high-performance supercapacitor electrodes

Double-Layer MnCo₂ S₄ @Ni-Co-S Core/Shell Nanostructure on Nickel Foam for High-Performance Supercapacitor

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