Hierarchical nickel sulfide hollow spheres for high performance supercapacitors

Zhu, Ting; Wang, Zhiyu; Ding, Shujiang; Chen, Jun Song; Lou, Xiong Wen David

doi:10.1039/c1ra00240f

Cited by 330 publications

(224 citation statements)

References 35 publications

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“…This suggests that the Cu and appropriate amount of PVP in MnS can decrease the Rct, significantly. This shows that the low Faraday resistance contributes to the enhanced SC and power of the Cu-MnS with 2PVP composite electrode in a KOH solution [40,41]. The long-term stability of the Cu-MnS and Cu-MnS with 2PVP electrodes was also performed at a current density of 1 A g −1 for 1000 cycles.…”

Section: Resultsmentioning

confidence: 99%

One-Pot Hydrothermal Synthesis of Novel Cu-MnS with PVP Cabbage-Like Nanostructures for High-Performance Supercapacitors

et al. 2018

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This paper reports the facile synthesis of a novel architecture of Cu-MnS with PVP, where the high theoretical capacitance of MnS, low-cost, and high electrical conductivity of Cu, as well as appreciable surface area with high thermal and mechanical conductivity of PVP, as a single entity to fabricate a high-performance electrode for supercapacitor. Benefiting from their unique structures, the Cu-MnS with 2PVP electrode materials show a high specific capacitance of 833.58 F g −1 at 1 A g −1 , reversibility for the charge/discharge process, which are much higher than that of the MnS-7 h, Cu-MnS, and Cu-MnS with 1 and 3PVP. The presence of an appropriate amount of PVP in Cu-MnS is favorable for improving the electrochemical performance of the electrode and the existence of Cu was inclined to enhance the electrical conductivity. The Cu-MnS with 2PVP electrode is a good reference for researchers to design and fabricate new electrode materials with enhanced capacitive performance.

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Section: Resultsmentioning

confidence: 99%

One-Pot Hydrothermal Synthesis of Novel Cu-MnS with PVP Cabbage-Like Nanostructures for High-Performance Supercapacitors

et al. 2018

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“…These can provide significant number of electroactive sites and shorter diffusion paths for charge transports, facilitating the redox reactions compared to their bulk or solid counterparts. 20 Besides, the nanometer-sized sheets are able to reduce diffusion time of the electrolyte ions, and can accommodate the strain during the OH -insertion and extraction during electrochemical cycling. 51 Further, the sacrificialtemplate growth process that we have developed results in robust adhesion between the inner and outer shells, leading to better stability during cycling.…”

Section: Resultsmentioning

confidence: 99%

Self-templating Scheme for the Synthesis of Nanostructured Transition-Metal Chalcogenide Electrodes for Capacitive Energy Storage

2015

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Due to their unique structural features including well-defined interior voids, low density, low coefficients of thermal expansion, large surface area and surface permeability, hollow micro/nanostructured transition metal sulfides with high conductivity have been investigated as new class of electrode materials for pseudocapacitor applications. Herein, we report a novel self-templating strategy to fabricate well-defined single and double-shell NiCo 2 S 4 hollow spheres, as a promising electrode material for pseudocapacitors. The surfaces of the NiCo 2 S 4 hollow spheres consist of self-assembled 2D mesoporous nanosheets. This unique morphology results in a high specific capacitance (1263 F g -1 at 2 A g -1 ), remarkable rate performance (75.3% retention of initial capacitance from 2 A g -1 to 60 A g -1 ) and exceptional reversibility with a cycling efficiency of 93.8% and 87% after 10,000 and 20,000 cycles, respectively, at a high current density of 10 A g -1 . The cycling stability of our ternary chalcogenides is comparable to carbonaceous electrode materials, but with much higher specific capacitance (higher than any previously reported ternary chalcogenide), suggesting that these unique chalcogenide structures have potential application in next-generation commercial pseudocapacitors.

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“…In particular, only one pair of redox peaks is observed in the all CV curves within the potential range from −0.2 to 0.8 V vs. Ag/AgCl, indicating that the electrochemical capacity of the Ni 3 S 2 electrode mainly originates from the purely faradaic reaction. The electrochemical reaction corresponding to the redox peaks of Ni 3 S 2 electrodes in alkaline electrolyte can be expressed as follows: 10,11 Ni 3 S 2 + 3OH − ↔ Ni 3 S 2 (OH) 3 + 3e…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, transition metal oxides or hydroxides should be recognized as battery-type electrodes and the corresponding capacity should be expressed in coulombs, C, or mAh. 9 Additionally, nickel sulfides have been widely studied in the fields of SCs, [10][11][12] hydrogen evolution, 13,14 photovoltaic cells, 15 and rechargeable lithium ion batteries 16 over the past decade. Zhu et al 10 synthesized the hierarchical nickel sulfide (NiS) hollow spheres by hydrothermal method, which can deliver a relatively high capacitance of 927 F g −1 at 4.08 A g −1 .…”

mentioning

confidence: 99%

“…9 Additionally, nickel sulfides have been widely studied in the fields of SCs, [10][11][12] hydrogen evolution, 13,14 photovoltaic cells, 15 and rechargeable lithium ion batteries 16 over the past decade. Zhu et al 10 synthesized the hierarchical nickel sulfide (NiS) hollow spheres by hydrothermal method, which can deliver a relatively high capacitance of 927 F g −1 at 4.08 A g −1 . Yang et al 11 successfully synthesized a hierarchical flower-like β-NiS architecture by via hydrothermal method with diethanolamine as the coordination agent and solvent.…”

mentioning

confidence: 99%

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Pulse-Reversal Deposition of Nickel Sulfide Thin Film as an Efficient Cathode Material for Hybrid Supercapacitors

Chou

Lin

2015

J. Electrochem. Soc.

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In this study, nickel sulfide (Ni 3 S 2 ) thin film was electrodeposited on Ni foam substrate by using a facile potentiodynamic (PD) and pulse-reversal (PR) method, respectively. After optimization of deposition parameters, the optimized Ni 3 S 2 electrode was prepared by using PR mode under −1 V pulse-on potential, 0 V pulse-reversal potential, duty cycle of 0.5 and pulse frequency of 0.1 Hz. It delivered an impressive specific capacity up to 179.5 mAh g −1 at current density of 2 A g −1 .The hybrid supercapacitor (SC) was assembled by using the optimized Ni 3 S 2 electrode as cathode and activated carbon fiber cloth (ACFC) as anode, respectively. The Ni 3 S 2 //ACFC hybrid SC exhibited a high specific capacity of 26.7 mAh g −1 at charge-discharge current density of 2 A g −1 and displayed a maximum energy density of 26.4 Wh kg −1 at 1978 W kg −1 based on the total mass of active material of 9.2 mg. Furthermore, the Ni 3 S 2 //ACFC hybrid SC showed an impressive excellent cycling performance in 1 M KOH aqueous electrolyte at current density of 2 A g −1 , with 97% specific capacitance retained after cycling of 400-5000 consecutive charge/discharge tests. Supercapacitors (SCs) have been widely recognized in a wide range of applications in energy storage over the past decade, such as hybrid electric vehicles, mobile electronic devices, large industrial equipments, memory backup systems, and military devices. [1][2][3][4] It is due to their unique properties including higher specific power density (10 kW kg −1 ) than batteries and higher specific energy density (5-10 Wh kg −1 ) than conventional dielectric capacitors. SCs can be typically classified by the mechanisms of the charge storage/delivery, namely the electric double-layer capacitors (EDLCs) and psuedocapacitors. The EDLCs store energy by the separation of electronic and ionic charges at interface between high specific surface material and electrolyte. The EDLCs, which are generally with the carbonaceous materials as electroactive materials including activated carbon, carbon nanotube and graphene, have been recognized to be with low capacitance, especially in aqueous electrolyte. The pseudocapacitors based on the typical RuO 2 and MnO 2 electroactive materials usually show higher specific capacitance than EDLCs due to their fast and reversible faradic redox reaction, in which a linear dependence of the charge stored with the width of the potential window like EDLCs can be observed. In recent years, great deals of transition metal oxides, and hydroxides, such as Co 3 O 4 , 5 Co(OH) 2 , 6 NiO 7 and Ni(OH) 2 8 have been extensively investigated as electroactive materials for pseudocapacitors. However, they often display flat discharge plateaus during charge/discharge tests under constant current, which is distinctly different from those of RuO 2 and MnO 2 . Therefore, transition metal oxides or hydroxides should be recognized as battery-type electrodes and the corresponding capacity should be expressed in coulombs, C, or mAh. successfully synthesized a hierarch...

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Hierarchical nickel sulfide hollow spheres for high performance supercapacitors

Cited by 330 publications

References 35 publications

One-Pot Hydrothermal Synthesis of Novel Cu-MnS with PVP Cabbage-Like Nanostructures for High-Performance Supercapacitors

One-Pot Hydrothermal Synthesis of Novel Cu-MnS with PVP Cabbage-Like Nanostructures for High-Performance Supercapacitors

Self-templating Scheme for the Synthesis of Nanostructured Transition-Metal Chalcogenide Electrodes for Capacitive Energy Storage

Pulse-Reversal Deposition of Nickel Sulfide Thin Film as an Efficient Cathode Material for Hybrid Supercapacitors

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