One-step hydrothermal synthesis of flaky attached hollow-sphere structure NiCo 2 S 4 for electrochemical capacitor application

Wei, Chao; Huang, Ying; Xue, Shuai; Zhang, Xin; Chen, Xuefang; Yan, Jing; Yao, Weigang

doi:10.1016/j.cej.2017.02.130

Cited by 82 publications

(33 citation statements)

References 47 publications

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“…36 °is due to the MnO x [7] . The diffraction peaks of NCS/CC sample are well matched with NiCo 2 S 4 (JCPDS 200782) [31] . For NCS@MS (red line), the peaks deriving from either MnS or NiCo 2 S 4 , apart from the peak of MnO x are identified.…”

Section: Positive Electrode Materialsmentioning

confidence: 75%

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All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

Zhang

Huang

et al. 2017

Journal of Energy Chemistry

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In-situ growth of vertically aligned nickel cobalt sulfide nanowires on carbon nanotube fibers for high capacitance all-solid-state asymmetric fiber-supercapacitors Journal of Energy Chemistry 41, 209 (2020); Wet-spun poly(ionic liquid)-graphene hybrid fibers for high performance all-solid-state flexible supercapacitors Journal of Energy Chemistry 34, 104 (2019); Carbon nanotubes/graphitic carbon nitride nanocomposites for all-solid-state supercapacitors SCIENCE CHINA Technological Sciences Ni3S2 nanorods growing directly on Ni foam for all-solid-state asymmetric supercapacitor and efficient overall water splitting Journal of Energy Chemistry 46, 178 (2020);Porous NiCo 2 O 4 nanowires supported on carbon cloth for flexible asymmetric supercapacitor with high energy density : NiCo 2 S 4 @MnS core-shell structure Flexible All-solid-state supercapacitor High energy and power densities a b s t r a c t Electrode material based on a novel core-shell structure consisting of NiCo 2 S 4 (NCS) solid fiber core and MnS (MS) sheet shell (NCS@MS) in situ grown on carbon cloth (CC) has been successfully prepared by a simple sulfurization-assisted hydrothermal method for high performance supercapacitor. The synthesized NiCo 2 S 4 @MnS/CC electrode shows high capacitance of 1908.3 F g −1 at a current density of 0.5 A g −1 which is higher than those of NiCo 2 S 4 and MnS at the same current density. A flexible all-solid-state asymmetric supercapacitor (ASC) is constructed by using NiCo 2 S 4 @MnS/CC as positive electrode, active carbon/CC as negative electrode and KOH/poly (vinyl alcohol) (PVA) as electrolyte. The optimized ASC shows a maximum energy density of 23.3 Wh kg −1 at 1 A g −1 , a maximum power density of about 7.5 kw kg −1 at 10 A g −1 and remarkable cycling stability. After 90 0 0 cycles, the ASC still exhibited 67.8% retention rate and largely unchanged charge/discharge curves. The excellent electrochemical properties are resulted from the novel core-shell structure of the NiCo 2 S 4 @MnS/CC electrode, which possesses both high surface area for Faraday redox reaction and superior kinetics of charge transport. The NiCo 2 S 4 @MnS/CC electrode shows a promising potential for energy storage applications in the future.

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Section: Positive Electrode Materialsmentioning

confidence: 75%

“…After cooling to ambient temperature, the sample was rinsed 3 times with ethanol and DI water under ultra-sonication. To obtain NiCo 2 S 4 , the NCP/CC electrode was transferred into the autoclave containing TAA solution for sulfurization process at 160 °C for 12 h [30,31] .…”

Section: Synthesis Of Ncs and Ncs@ms On CCmentioning

confidence: 99%

All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

Zhang

Huang

et al. 2017

Journal of Energy Chemistry

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“…[73,74] The appearance of these divergent energy storage mechanisms can be calculated and distinguished from the other by examining the CV scans at different scan rates according to the following power law [75,76] The capacitive component consists of ion adsorption/desorption reactions at the electrode/electrolyte (double layer) and very fast faradic surface redox reactions (pseudocapacitance).…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

Effective Utilization of Waste Red Mud for High Performance Supercapacitor Electrodes

et al. 2018

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In recent years, metal oxide‐based, inexpensive, stable electrodes are being explored as a potent source of high performance, sustainable supercapacitors. Here, the employment of industrial waste red mud as a pseudocapacitive electrode material is reported. Mechanical milling is used to produce uniform red mud nanoparticles, which are rich in hematite (Fe 2 O 3 ), and lower amounts of other metal oxides. A comprehensive supercapacitive study of the electrode is presented as a function of ball‐milling time up to 15 h. Ten‐hour ball‐milled samples exhibit the highest pseudocapacitive behavior with a specific capacitance value of ≈317 F g −1 , at a scan rate of 10 mV s −1 in 6 m aqueous potassium hydroxide electrolyte solution. The modified electrode shows an extraordinary retention of ≈97% after 5000 cycles. A detailed quantitative electrochemical analysis is carried out to understand the charge storage mechanism at the electrode–electrolyte interface. The formation of uniform nanoparticles and increased electrode stability are correlated with the high performance. This work presents two significant benefits for the environment; in energy storage, it shows the production of a stable and efficient supercapacitor electrode, and in waste management with new applications for the treatment of red mud.

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“…Benefiting from their outstanding electrochemical activities and natural abundances, transition metal sulfides have played important parts in inexpensive and highly efficient energy storage/conversion systems . Recently, metal sulfides with various hollow structures have been employed as the materials for supercapacitor electrodes or OER electrocatalysts because of their advantages including high surface‐to‐volume ratio, low density and open structure . Furthermore, the cavities in hollow structures can act as “ion‐buffering storage pool” to decrease the diffusion distances of electrolyte ions ,.…”

Section: Introductionmentioning

confidence: 99%

Facile and Controllable One‐Pot Synthesis of Hierarchical Co₉S₈ Hollow Microspheres as High‐Performance Electroactive Materials for Energy Storage and Conversion

2017

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Hierarchical Co 9 S 8 hollow microspheres with nanosheet building units are synthesized via a one-step hydrothermal method. The presence of glucose in the synthesis is essential to the formation of the hollow structure and influences the size and morphology of the microspheres. Benefiting from the advantages of a hollow architecture, a conductive carbon coating and Co 9 S 8 nanosheet units, the composite exhibits outstanding electrochemical properties. When the composite electrode is evaluated as the cathode material for supercapacitors, it exhibits a high specific capacitance of 514 F g À1 at 1.0 A g À1 and a capacitance retention of circa 88 % over 1000 cycles at 8 A g À1 .On the other hand, the nanosheet-constructed hollow structure can efficiently promote the electrocatalytic activity of Co 9 S 8 toward the oxygen evolution reaction. Due to the fact that Co 9 S 8 nanosheets impart largely exposed active sites, the composite exhibits a low Tafel slope of 66 mV dec À1 and no obvious degradation after 12 h water oxidation.

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One-step hydrothermal synthesis of flaky attached hollow-sphere structure NiCo 2 S 4 for electrochemical capacitor application

Cited by 82 publications

References 47 publications

All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

Effective Utilization of Waste Red Mud for High Performance Supercapacitor Electrodes

Facile and Controllable One‐Pot Synthesis of Hierarchical Co₉S₈ Hollow Microspheres as High‐Performance Electroactive Materials for Energy Storage and Conversion

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One-step hydrothermal synthesis of flaky attached hollow-sphere structure NiCo 2 S 4 for electrochemical capacitor application

Cited by 82 publications

References 47 publications

All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

All-solid-state flexible asymmetric supercapacitors with high energy and power densities based on NiCo2S4@MnS and active carbon

Effective Utilization of Waste Red Mud for High Performance Supercapacitor Electrodes

Facile and Controllable One‐Pot Synthesis of Hierarchical Co9S8 Hollow Microspheres as High‐Performance Electroactive Materials for Energy Storage and Conversion

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Facile and Controllable One‐Pot Synthesis of Hierarchical Co₉S₈ Hollow Microspheres as High‐Performance Electroactive Materials for Energy Storage and Conversion