Controllable MnCo<sub>2</sub>S<sub>4</sub> nanostructures for high performance hybrid supercapacitors

Elshahawy, Abdelnaby M.; Li, Xin; Zhang, Hong; Hu, Yating; Ho, Kuan Hung; Guan, Cao; Wang, John

doi:10.1039/c7ta00943g

Cited by 211 publications

(87 citation statements)

References 65 publications

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“…The chemical composition of the hierarchical MnCo 2 S 4 nanotubes materials is examined via XRD. As shown XRD pattern in Figure S2 , all diffraction peaks can be easily indexed to MnCo 2 S 4 , which is similar to the previous reports . Energy‐dispersive X‐ray spectroscopy (EDX) measurements confirm that the atom ratio of Mn to Co is approximately 1: 2.2 ( Figure S3 ), which corresponds to the theoretical composition.…”

Section: Resultssupporting

confidence: 87%

Preparation of Hierarchical MnCo₂S₄ Nanotubes for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors

et al. 2017

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Hierarchical MnCo2S4 nanotubes have been successfully prepared via a facile self‐template approach. The as‐prepared hierarchical MnCo2S4 nanotubes are evaluated as electrode materials for supercapacitors, which exhibits a specific capacitance of 705.2 F g−1 at 0.5 A g−1 and a remarkable cycling performance. Moreover, the hierarchical MnCo2S4 nanotubes are also applied in non‐enzymatic glucose sensors, which possesses good electrocatalytic performances with a low determination limit (0.1 μM) and good selectivity. In addition, yolk‐shelled MnCo2O4 prisms were also prepared via the self‐template method. The electrochemical performance of the yolk‐shelled MnCo2O4 prisms were also studied. It is found that the as‐prepared hierarchical MnCo2S4 nanotubes show better electrochemical performances than yolk‐shelled MnCo2O4 in this work.

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Section: Resultssupporting

confidence: 87%

Preparation of Hierarchical MnCo₂S₄ Nanotubes for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors

et al. 2017

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“…Pseudocapacitors which store charges by utilizing fast and reversible faradaic redox reactions at the electrode, can exhibit much better electrochemical performance compared with EDLCs . However, the main drawback of supercapacitor is low energy density, which is an order of magnitude lower than that of batteries …”

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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“…Many nanostructures, such as zero-dimensional nanoparticles, 12,14,15 one-dimensional nanorods, nanofibers or nanowires, [16][17][18][19] two-dimensional nanoflakes or nanoplates 20,21 have been developed to improve electrochemical performance because of their large surface areas. Many nanostructures, such as zero-dimensional nanoparticles, 12,14,15 one-dimensional nanorods, nanofibers or nanowires, [16][17][18][19] two-dimensional nanoflakes or nanoplates 20,21 have been developed to improve electrochemical performance because of their large surface areas.…”

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confidence: 99%

Facile synthesis of Ni_0.5Mn_0.5Co₂O₄ nanoflowers as high‐performance electrode material for supercapacitors

Zhao

et al. 2019

J Am Ceram Soc

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The rational synthesis of mixed transition metal oxides (MTMOs) with three‐dimensional hierarchical porous structure has been proved to be an effective strategy for improving electrochemical performances of binary metal oxides. Herein, the hierarchically Ni1‐xMnxCo2O4 nanoflowers are synthesized by a facile hydrothermal method combined with subsequent heat‐treatment. It is found that Ni/Mn atom ratio has a significant influence on the microstructures and electrochemical properties of Ni1‐xMnxCo2O4. The Ni0.5Mn0.5Co2O4 sample with a Ni/Mn atom ratio of 1 exhibits the highest specific capacity of 366 F/g at a current density of 1 A/g as compared to the other Ni1‐xMnxCo2O4 samples. In addition, Ni0.5Mn0.5Co2O4 displays high rate capability and cycling performance. The excellent electrochemical performances of Ni0.5Mn0.5Co2O4 could be ascribed to the large surface area and high mesoporosity, leading to the increased accessible surface for ion access and the rapid electrochemical reactions. The as‐synthesized Ni0.5Mn0.5Co2O4 nanoflowers could be used as a potential electrode materials for Supercapacitors. Furthermore, this study provides a facile method to synthesize other MTMOs with three‐dimensional hierarchical nanostructure. An asymmetric supercapacitor is assembled with Ni0.5Mn0.5Co2O4 as the positive electrode and activated carbon as the negative electrode. The supercapacitor shows an energy density of 20.2 Wh/kg at a power density of 700 W/kg. Cycling stability is achieved with 82% retention after 5000 charge‐discharge cycles.

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Controllable MnCo₂S₄ nanostructures for high performance hybrid supercapacitors

Abstract: Sulphospinel materials, such as MnCo2S4, are being widely investigated as a promising class of candidates for energy storage.

Cited by 211 publications

References 65 publications

Preparation of Hierarchical MnCo₂S₄ Nanotubes for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors

Preparation of Hierarchical MnCo₂S₄ Nanotubes for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors

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

Facile synthesis of Ni_0.5Mn_0.5Co₂O₄ nanoflowers as high‐performance electrode material for supercapacitors

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Controllable MnCo2S4 nanostructures for high performance hybrid supercapacitors

Abstract: Sulphospinel materials, such as MnCo2S4, are being widely investigated as a promising class of candidates for energy storage.

Cited by 211 publications

References 65 publications

Preparation of Hierarchical MnCo2S4 Nanotubes for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors

Preparation of Hierarchical MnCo2S4 Nanotubes for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors

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

Facile synthesis of Ni0.5Mn0.5Co2O4 nanoflowers as high‐performance electrode material for supercapacitors

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Controllable MnCo₂S₄ nanostructures for high performance hybrid supercapacitors

Preparation of Hierarchical MnCo₂S₄ Nanotubes for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors

Preparation of Hierarchical MnCo₂S₄ Nanotubes for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors

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

Facile synthesis of Ni_0.5Mn_0.5Co₂O₄ nanoflowers as high‐performance electrode material for supercapacitors