Carbon Doped MnCo 2 S 4 Microcubes Grown on Ni foam as High Energy Density Faradaic Electrode

Pramanik, Atin; Maiti, Sandipan; Sreemany, Monjoy; Mahanty, Sourindra

doi:10.1016/j.electacta.2016.07.159

Cited by 80 publications

(39 citation statements)

References 45 publications

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“…Fortunately, the PPy material is able to contribute the improvement of capacitance by doping/dedoping in KOH solution, and the PPy coating layer can also provide fast accessibility of ion to the material surface . Figure a–d shows the GCD profiles of the NiCo 2 S 4 and NiCo 2 S 4 @PPy electrodes at various current densities from 1 to 20 A g −1 between 0.0 and 0.5 V. The GCD profiles with the nonlinear property and the two apparent charge–recharge platforms caused by the diffusion process of the charged species deep inside the bulk of the working electrode material suggest faradaic redox reaction behavior, which is in accordance with the CV tests . Figure e compares the GCD profiles of all samples at 1 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Qiu

et al. 2020

Energy Tech

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A NiCo2S4@PPy series with sheet stacking structure and suitable pore size distribution is successfully synthesized through a one‐step vulcanization process and polymerization process. Interestingly, the abundant sites and large electroactive surface area of NiCo2S4@PPy stacking structure are formed via the “etching effect” of S2− ions and ultrasonic oscillation effect, which render the morphology of NiCo2S4@PPy with a lamellar feature. In contrast, polypyrrole (PPy) with good conductivity provides favorable electron transport pathways for electrolyte ions. The as‐prepared sheet stacking structure NiCo2S4@PPy (NCSP‐3) electrode delivers good electrochemical properties with the highest specific capacitance of 1606.6 F g−1 at 1 A g−1 and excellent rate performance of 77.4% at high discharge rate of 10 A g−1. Furthermore, the NCSP‐3 electrode exhibits remarkable cycling stability, where the ultimate specific capacitance has no attenuation (retained at around 100%) compared with its incipient value after 20 000 cycles even at 20 A g−1. These promising results can be put down to the unique structure and synergetic effect of NiCo2S4 and PPy, which ensure good conductivity, more redox reactions, as well as large specific surface area. This work has guiding significance for the general and low‐cost route design of high‐performance electrode materials for supercapacitor applications.

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Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Qiu

et al. 2020

Energy Tech

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“…In most recent reports, numerous double metal sulfides such as MCo 2 S 4 (M=Ni, Cu, and Mn) have been compared to single metal sulfides and showed better electrochemical activity and specific capacity. This is best explained by the synergistic interaction between the two different metal ions, which allows them to have a richer redox state, and more importantly, their electrical conductivity is also qualitatively increased.…”

Section: Introductionmentioning

confidence: 99%

Iron‐Cobalt Bi‐Metallic Sulfide Nanowires on Ni Foam for Applications in High‐Performance Supercapacitors

Liu

et al. 2018

ChemElectroChem

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Supercapacitors do not only exhibit the traditional high power density of capacitors, but also show the high energy density characteristic for batteries. In addition, fast charging, outstanding rate of magnification, and safety as well as pollutant‐free characteristics make supercapacitors unprecedented for applications and development prospects in the field of energy storage. In this study, a facile two‐step hydrothermal method was presented for the synthesis of FeCo2S4 nanowire structures directly formed on nickel (Ni) foam. The as‐prepared FeCo2S4 samples were characterized using X‐ray powder diffraction and scanning electron microscopy. The electrochemical performance of the as‐prepared FeCo2S4 electrodes is studied by cyclic voltammetry (CV), galvanostatic charge‐discharge measurements (CD), and cycle stability tests. The as‐prepared FeCo2S4 nanowires exhibit a high specific capacitance of about 337 mAh g−1 at a current density of 2 A g−1 in 3 M KOH solution. After 2000 cycles at 6 A g−1, 90 % of the initial capacity is retained, showing the excellent stability of the prepared material. At a high current density of 12 A g−1, the capacity can reach 273 mAh g−1 with 81 % remaining, exhibiting outstanding rate characteristics. The superior electrochemical performance can be attributed to the high specific surface area, ion/electron transportability, and the excellent electrical conductivity of the active material itself. Therefore, as the most advanced energy storage material, FeCo2S4 will have great development prospects in terms of energy conversion, storage, and electrocatalysis.

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“…[11] Especially,b inary TMS such as MCo 2 S 4 (Mn, Ni, Cu, and Zn) can offer better electrochemical activity and highers pecific capacity than monometal sulfides owing to their multiple oxidation states. [12][13][14][15] For example, NiCo 2 S 4 exhibits superiore lectrochemical activity and possesses ac apacitance about 2-3 times highert han that of single nickel or cobalt sulfides,w hich could be attributed to the synergy of the bimetallic ions andt he rich redox reaction during the Faradaic process. [16] More significantly,T MS also shows ah igher electrical conductivityt han its corresponding binary metal oxidesd ue to the lower band gap through anion exchange process, thus has been considered as one kind of promising electrode materialf or SCs.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical FeCo₂S₄ Nanotube Arrays Deposited on 3D Carbon Foam as Binder‐free Electrodes for High‐performance Asymmetric Pseudocapacitors

Huang

Cui

Hua

et al. 2018

Chemistry An Asian Journal

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The ever-increasing global demand for green energy resources calls for more research attention on the development of cheap and efficient energy storage systems. Herein, we propose the rational design of a 3D carbon foam electrode deposited with perpendicularly oriented FeCo S nanotubes arrays (FeCo S /CMF) for high-performance asymmetric supercapacitors. In this work, the macroporous CMF served as conducting backbone not only to enhance the electrical conductivity of the composite, but also to promote the uniform growth of FeCo S nanotubes. Deposited hierarchical FeCo S nanotubes arrays with open hollow structures can afford numerous exposed electroactive sites for Faradaic redox reaction and provide short interior channels for fast electrolyte transmission. Due to these unique features, obtained 3D hierarchical FeCo S /CMF composite foam exhibits a high specific capacitance of 2430 F g (specific capacity of 337.5 mAh g ) at 1 A g , and excellent capacitance retention of 91 % after 5000 cycles at a high current density of 9 A g , which is superior to most of those previously reported binary metal sulfide-based electrodes. Moreover, asymmetric supercapacitor device assembled using the FeCo S /CMF as positive electrode also delivers a high energy density of 78.7 W h kg at a power density of 800.3 W kg . Therefore, this work provides a new strategy for the low-cost synthesis of 3D foam electrodes towards high-performance supercapacitor devices.

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Carbon Doped MnCo 2 S 4 Microcubes Grown on Ni foam as High Energy Density Faradaic Electrode

Cited by 80 publications

References 45 publications

Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Iron‐Cobalt Bi‐Metallic Sulfide Nanowires on Ni Foam for Applications in High‐Performance Supercapacitors

Hierarchical FeCo₂S₄ Nanotube Arrays Deposited on 3D Carbon Foam as Binder‐free Electrodes for High‐performance Asymmetric Pseudocapacitors

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Carbon Doped MnCo 2 S 4 Microcubes Grown on Ni foam as High Energy Density Faradaic Electrode

Cited by 80 publications

References 45 publications

Facile Synthesis of Sheet Stacking Structure NiCo2S4@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Facile Synthesis of Sheet Stacking Structure NiCo2S4@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Iron‐Cobalt Bi‐Metallic Sulfide Nanowires on Ni Foam for Applications in High‐Performance Supercapacitors

Hierarchical FeCo2S4 Nanotube Arrays Deposited on 3D Carbon Foam as Binder‐free Electrodes for High‐performance Asymmetric Pseudocapacitors

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Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Facile Synthesis of Sheet Stacking Structure NiCo₂S₄@PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors

Hierarchical FeCo₂S₄ Nanotube Arrays Deposited on 3D Carbon Foam as Binder‐free Electrodes for High‐performance Asymmetric Pseudocapacitors