Fabrication of dual-hollow heterostructure of Ni2CoS4 sphere and nanotubes as advanced electrode for high-performance flexible all-solid-state supercapacitors

Lü, Lei; Liu, Anru; Xu, Yuhan; Yang, Fubin; Wang, Jun; Deng, Qiang; Zeng, Zheling; Deng, Shuguang

doi:10.1016/j.jcis.2019.12.074

Cited by 18 publications

(4 citation statements)

References 48 publications

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“…The Ni1.5Co1.5S4/g-C3N4//AC supercapacitor delivers high energy density of 49.0 Wh kg −1 at a power density of 799.0 W kg −1 . These values surpass those of previously reported symmetric and asymmetric supercapacitors based on g-C3N4 composites, such as g-C3N4@Ni(OH)2 [24], ZnS/g-C3N4 [42] and porous g-C3N4 [43][44][45].…”

Section: Resultscontrasting

confidence: 73%

Synthesis of Hierarchical Porous Ni1.5Co1.5S4/g-C3N4 Composite for Supercapacitor with Excellent Cycle Stability

Jin

Jiang

et al. 2020

Nanomaterials

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In this work, the hierarchical porous Ni1.5Co1.5S4/g-C3N4 composite was prepared by growing Ni1.5Co1.5S4 nanoparticles on graphitic carbon nitride (g-C3N4) nanosheets via a hydrothermal route. Due to the self-assembly of larger size g-C3N4 nanosheets as a skeleton, the prepared nanocomposite possesses a unique hierarchical porous structure that can provide short ions diffusion and fast electron transport. As a result, the Ni1.5Co1.5S4/g-C3N4 composite exhibits a high specific capacitance of 1827 F g−1 at a current density of 1 A g−1, which is 1.53 times that of pure Ni1.5Co1.5S4 (1191 F g−1). In particular, the Ni1.5Co1.5S4/g-C3N4//activated carbon (AC) asymmetric supercapacitor delivers a high energy density of 49.0 Wh kg−1 at a power density of 799.0 W kg−1. Moreover, the assembled device shows outstanding cycle stability with 95.5% capacitance retention after 8000 cycles at a high current density of 10 A g−1. The attractive performance indicates that the easily synthesized and low-cost Ni1.5Co1.5S4/g-C3N4 composite would be a promising electrode material for supercapacitor application.

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Section: Resultscontrasting

confidence: 73%

Synthesis of Hierarchical Porous Ni1.5Co1.5S4/g-C3N4 Composite for Supercapacitor with Excellent Cycle Stability

Jin

Jiang

et al. 2020

Nanomaterials

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“…Here, our NMS@S-gC//AC device in a two-series connection efficiently powers all LEDs ranging from red to blue. The overall outcome of this investigation discloses an enhanced performance of asymmetric g-C 3 N 4 composite-based supercapacitors using a new approach of self-assembled hierarchical silkworm-like electrode materials. − In previous investigations, various approaches had been reported for Co embodied with g-C 3 N 4 nanostructures because of superior theoretical values of Co and g-C 3 N 4 for storage applications, but here, we reported a new strategy with Mo rather than Co and the basic matrix also changed from g-C 3 N 4 to S-g-C 3 N 4 . Basically, g-C 3 N 4 is a 2D structure with a high nitrogen content, which enhances the electron-donor properties of the matrix and further leads to improved electron transportation of active material.…”

Section: Resultsmentioning

confidence: 61%

Self-Assembled Hierarchical Silkworm-Type Bimetallic Sulfide (NiMo₃S₄) Nanostructures Developed on S-g-C₃N₄ Sheets: Promising Electrode Material for Supercapacitors

Pallavolu

Vallem

Nallapureddy

et al. 2023

ACS Appl. Energy Mater.

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An electrode material composed of bimetallic sulfides on g-C 3 N 4 typically enhances the energy storage capacity of devices due to the merits of each component, but it still suffers from low energy density over long cycles. Although Ni-based bimetallic sulfides have become good electrode materials for supercapacitors, practical applications of these materials are hindered due to unsatisfactory cycling stability. Here, we demonstrate a simple two-step in situ approach to prepare bimetallic sulfide nanobulbs on a sulfur-doped graphitic carbon nitrate matrix for a NiMo 3 S 4 @S-g-C 3 N 4 composite, which is further used for supercapacitor devices. A small amount of sulfur doping to g-C 3 N 4 enhances the conducting channels for electron transportation. An NMS@S-gC nanocomposite clearly shows the formation of small nanobulbs that are formed as silk warm-type hierarchical morphology structures and these were wrapped on the surface of S-gC porous nanosheets. The device made up of these composites exhibited a maximum specific capacitance of 142.4 F g −1 , a high energy density of 41.4 Wh kg −1 , and a power density of 723.5 W kg −1 at a current density of 1 A g −1 . Meanwhile, in a three-electrode device configuration, the working electrode demonstrates a specific capacitance of 934.2 F g −1 at 1 A g −1 , which is 1.6 times greater than that of bare NiMo 3 S 4 . Moreover, the capacitance retention of the device is about 91% even after 5000 cycles at 8 A g −1 . The results obtained in this investigation surpassed most reported metallic sulfides on g-C 3 N 4 . Hence, this work could give a different pathway for the synthesis of electrode materials for energy storage devices.

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“…PVA/KOH gel was utilized as the solid polymer electrolyte. The specific capacitance ( C s ) of the electrode based on CV and GCD curves was calculated by eqs and (). − The specific capacitance of the devices based on CV and GCD curves was obtained by eqs and (). − where C s (F g –1 ) and C cell (F g –1 ) represents the specific capacitance of the electrode and device, m (g) is the loading mass, v (V s –1 ) is the potential scan rate, ΔV (V) corresponds to the potential window, Δ t (s) refers to the discharge time, and I (A) is the discharge current.…”

Section: Methodsmentioning

confidence: 99%

Structural Engineering of Ultrathin, Lightweight, and Bendable Electrodes Based on a Nanowire Network Current Collector Enables Flexible Energy-Storage Devices

Zhong

Chen

Liang

et al. 2022

ACS Appl. Energy Mater.

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Because of the rapid development of portable electronics, there is an urgent need for ultrathin, lightweight, and bendable electrodes for flexible and wearable energy-storage devices (FWESDs). This paper introduces the structural engineering of flexible electrodes with the above characteristics based on a Ag nanowire (NW) network current collector. The conductive interconnected networks give electrodes a highway of electron transport and excellent flexibility. Two kinds of nanostructures have been designed for high-performance electrodes, enabling diverse applications in FWESDs. In a core–shell Ag@NiCo/MnO x NW electrode, the MnO x thin shell layer favors a quick and reversible faradic reaction at the near surface. The electrode achieves a specific capacity of 41 mF cm–2 (350 F g–1), a capacitance retention rate of 88% after 2000 cycles, and stable electrochemical performance under repeated bending. In double-layer Ag@NiCo NW-Co(OH)2 electrode, the vertical growth of Co(OH)2 nanosheets covers the entire network, generating a high mass loading and abundant pathways for ion diffusion. As a result, the electrode delivers a high capacity of 376 mF cm–2 (1886 F g–1) and an excellent Coulombic efficiency of 95%. Both electrodes are demonstrated in FWESDs under various working scenarios, indicating promising prospects in the next generation of flexible electronics.

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Fabrication of dual-hollow heterostructure of Ni2CoS4 sphere and nanotubes as advanced electrode for high-performance flexible all-solid-state supercapacitors

Cited by 18 publications

References 48 publications

Synthesis of Hierarchical Porous Ni1.5Co1.5S4/g-C3N4 Composite for Supercapacitor with Excellent Cycle Stability

Synthesis of Hierarchical Porous Ni1.5Co1.5S4/g-C3N4 Composite for Supercapacitor with Excellent Cycle Stability

Self-Assembled Hierarchical Silkworm-Type Bimetallic Sulfide (NiMo₃S₄) Nanostructures Developed on S-g-C₃N₄ Sheets: Promising Electrode Material for Supercapacitors

Structural Engineering of Ultrathin, Lightweight, and Bendable Electrodes Based on a Nanowire Network Current Collector Enables Flexible Energy-Storage Devices

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Fabrication of dual-hollow heterostructure of Ni2CoS4 sphere and nanotubes as advanced electrode for high-performance flexible all-solid-state supercapacitors

Cited by 18 publications

References 48 publications

Synthesis of Hierarchical Porous Ni1.5Co1.5S4/g-C3N4 Composite for Supercapacitor with Excellent Cycle Stability

Synthesis of Hierarchical Porous Ni1.5Co1.5S4/g-C3N4 Composite for Supercapacitor with Excellent Cycle Stability

Self-Assembled Hierarchical Silkworm-Type Bimetallic Sulfide (NiMo3S4) Nanostructures Developed on S-g-C3N4 Sheets: Promising Electrode Material for Supercapacitors

Structural Engineering of Ultrathin, Lightweight, and Bendable Electrodes Based on a Nanowire Network Current Collector Enables Flexible Energy-Storage Devices

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Self-Assembled Hierarchical Silkworm-Type Bimetallic Sulfide (NiMo₃S₄) Nanostructures Developed on S-g-C₃N₄ Sheets: Promising Electrode Material for Supercapacitors