Homogeneous core–shell NiCo<sub>2</sub>S<sub>4</sub> nanostructures supported on nickel foam for supercapacitors

Kong, Weiqiang; Lü, Chenchen; Zhang, Wu; Pu, Jun; Wang, Zhenghua

doi:10.1039/c5ta02432c

Cited by 437 publications

(169 citation statements)

References 46 publications

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“…4a. The peaks at 169.7, 781.7 and 855.07 eV, corresponds to S 2p, Co 2p and Ni 2p spectrums, respectively, indicating the existence of S, Co and Ni elements in the as-synthesized sample [19]. Figure 4b shows Co 2p spectrum, the Gaussian fitted peaks around binding energy of 781.931 and 797.677 eV shows the existence of Co 2?…”

Section: Resultsmentioning

confidence: 86%

“…and the peaks around binding energy of 779.063 and 795.268 eV corresponds to Co 3? , while the two remaining are satellite peaks of Co 2p spectrum [19,21]. Similarly, in Ni 2p spectrum Fig.…”

Section: Resultsmentioning

confidence: 86%

“…Cyclic Voltammetry (CV), galvanostatic charge-discharge (GCD), electrochemical impedance spectroscopy (EIS) and cycle stability tests were conducted to study electrochemical properties of our CFL-NCS. The average specific and areal capacitance values were calculated from GCD curves, using the relations [19,20],…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

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In situ grown cockscomb flower-like nanostructure of NiCo2S4 as high performance supercapacitors

Beka

Liu

2016

J Mater Sci: Mater Electron

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Cockscomb flower-like NiCo 2 S 4 composite material is made for supercapacitor application by using two step hydrothermal processes. The cockscomb flowerlike NiCo 2 S 4 architecture contains numerous ultrathin folded nanosheets which increases the active areas of the electrode and the three dimensional open space between the flower sheets facilitates the easy flow of electrolyte ions and leads to efficient utilization of active materials even at high current densities. Two kinds of composite electrodes were fabricated by coating and in situ growing a cockscomb flower-like of NiCo 2 S 4 on nickel foam current collector. The in situ grown cockscomb flower-like NiCo 2 S 4 showed superior performance compared to cockscomb flower-like of NiCo 2 S 4 coated on nickel foam by avoiding the uses of polymer binders which adds dead areas and increase resistance on the electron and ion diffusion. Using this advantage the in situ grown cockscomb flower-like of NiCo 2 S 4 showed high specific capacitance of 1707 F/g at current density of 1 A/g and areal capacitance of 4.1 F/cm 2 at current density of 2.4 mA/cm 2 with good rate capability of 65.12 % as current increases from 2.4 to 80 mA/cm 2 . Such excellent conductive and stable structure may find potential application in future energy storage devices.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 86%

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In situ grown cockscomb flower-like nanostructure of NiCo2S4 as high performance supercapacitors

Beka

Liu

2016

J Mater Sci: Mater Electron

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“…Additionally, the fabricated core-shelled NiCo 2 S 4 nanoarrays//AC asymmetric HSC device exhibits an energy density of 22.8 W h kg −1 at a power density of 160 W kg −1 . In another study, in contrast, www.advenergymat.de NiCo 2 S 4 nanotubes are decorated on NiCo 2 S 4 nanosheet arrays by a multistep method, [181] which can be clearly observed from Figure 4c [182] Copyright 2015, Royal Society of Chemistry. Panels (c,d): Reproduced with permission.…”

Section: Ni-co-smentioning

confidence: 99%

“…[70,[178][179][180][181][182] The hierarchically structured nanoarrays are expected to enlarge the utilization of the active materials, endowing more electroactive sites for ion adsorption and Faradaic redox reactions. For example, Kong et al reported the synthesis of a core-shelled hierarchical structure on NF, [182] in which NiCo 2 S 4 nanotubes are wrapped by NiCo 2 S 4 nanosheets, as shown in Figure 4a,b. They observed that the hydrothermal sulfidation temperature of 110 °C is essential to transform the nickel cobalt carbonate hydroxide nanowire precursor into core-shelled structure NiCo 2 S 4 .…”

Section: Ni-co-smentioning

confidence: 99%

Mixed Metal Sulfides for Electrochemical Energy Storage and Conversion

Lou

2017

Advanced Energy Materials

692

319

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Mixed metal sulfides (MMSs) have attracted increased attention as promising electrode materials for electrochemical energy storage and conversion systems including lithium‐ion batteries (LIBs), sodium‐ion batteries (SIBs), hybrid supercapacitors (HSCs), metal–air batteries (MABs), and water splitting. Compared with monometal sulfides, MMSs exhibit greatly enhanced electrochemical performance, which is largely originated from their higher electronic conductivity and richer redox reactions. In this review, recent progresses in the rational design and synthesis of diverse MMS‐based micro/nanostructures with controlled morphologies, sizes, and compositions for LIBs, SIBs, HSCs, MABs, and water splitting are summarized. In particular, nanostructuring, synthesis of nanocomposites with carbonaceous materials and fabrication of 3D MMS‐based electrodes are demonstrated to be three effective approaches for improving the electrochemical performance of MMS‐based electrode materials. Furthermore, some potential challenges as well as prospects are discussed to further advance the development of MMS‐based electrode materials for next‐generation electrochemical energy storage and conversion systems.

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Hierarchical NiCo₂S₄ Nanowire Arrays Supported on Ni Foam: An Efficient and Durable Bifunctional Electrocatalyst for Oxygen and Hydrogen Evolution Reactions

Sivanantham

Ganesan

Shanmugam

2016

Adv Funct Materials

1,263

745

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A recent approach for solar‐to‐hydrogen generation has been water electrolysis using efficient, stable, and inexpensive bifunctional electrocatalysts within strong electrolytes. Herein, the direct growth of 1D NiCo2S4 nanowire (NW) arrays on a 3D Ni foam (NF) is described. This NiCo2S4 NW/NF array functions as an efficient bifunctional electrocatalyst for overall water splitting with excellent activity and stability. The 3D‐Ni foam facilitates the directional growth, exposing more active sites of the catalyst for electrochemical reactions at the electrode–electrolyte interface. The binder‐free, self‐made NiCo2S4 NW/NF electrode delivers a hydrogen production current density of 10 mA cm–2 at an overpotential of 260 mV for the oxygen evolution reaction and at 210 mV (versus a reversible hydrogen electrode) for the hydrogen evolution reaction in 1 m KOH. This highly active and stable bifunctional electrocatalyst enables the preparation of an alkaline water electrolyzer that could deliver 10 mA cm–2 under a cell voltage of 1.63 V. Because the nonprecious‐metal NiCo2S4 NW/NF foam‐based electrodes afford the vigorous and continuous evolution of both H2 and O2 at 1.68 V, generated using a solar panel, they appear to be promising water splitting devices for large‐scale solar‐to‐hydrogen generation.

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Homogeneous core–shell NiCo₂S₄ nanostructures supported on nickel foam for supercapacitors

Abstract: Homogeneous core–shell NiCo2S4 nanostructures supported on nickel can be applied as a high-performance supercapacitor electrode.

Cited by 437 publications

References 46 publications

In situ grown cockscomb flower-like nanostructure of NiCo2S4 as high performance supercapacitors

In situ grown cockscomb flower-like nanostructure of NiCo2S4 as high performance supercapacitors

Mixed Metal Sulfides for Electrochemical Energy Storage and Conversion

Hierarchical NiCo₂S₄ Nanowire Arrays Supported on Ni Foam: An Efficient and Durable Bifunctional Electrocatalyst for Oxygen and Hydrogen Evolution Reactions

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Homogeneous core–shell NiCo2S4 nanostructures supported on nickel foam for supercapacitors

Abstract: Homogeneous core–shell NiCo2S4 nanostructures supported on nickel can be applied as a high-performance supercapacitor electrode.

Cited by 437 publications

References 46 publications

In situ grown cockscomb flower-like nanostructure of NiCo2S4 as high performance supercapacitors

In situ grown cockscomb flower-like nanostructure of NiCo2S4 as high performance supercapacitors

Mixed Metal Sulfides for Electrochemical Energy Storage and Conversion

Hierarchical NiCo2S4 Nanowire Arrays Supported on Ni Foam: An Efficient and Durable Bifunctional Electrocatalyst for Oxygen and Hydrogen Evolution Reactions

Contact Info

Product

Resources

About

Homogeneous core–shell NiCo₂S₄ nanostructures supported on nickel foam for supercapacitors

Hierarchical NiCo₂S₄ Nanowire Arrays Supported on Ni Foam: An Efficient and Durable Bifunctional Electrocatalyst for Oxygen and Hydrogen Evolution Reactions