Nickel cobalt sulfide nanosheets uniformly anchored on porous graphitic carbon nitride for supercapacitors with high cycling performance

Li, Zhongchun; Wu, Lei; Wang, Liangbiao; Gu, Aiqin; Zhou, Quanfa

doi:10.1016/j.electacta.2017.02.087

Cited by 109 publications

(38 citation statements)

References 38 publications

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“…Extensive research has focused on directly growing or depositing pseudocapacitive materials on g-C 3 N 4 NSs as SC electrodes 19,20 . For example, Zhang et al constructed a lamellar Ni-Al double hydroxide/g-C 3 N 4 NS hybrid electrode via an in situ self-assembly approach 21 that delivered a specific capacitance as high as 714 F g −1 at 0.5 A g −1 .…”

Section: Introductionmentioning

confidence: 99%

Boosting ion dynamics through superwettable leaf-like film based on porous g-C3N4 nanosheets for ionogel supercapacitors

et al. 2019

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Ionic liquid (IL) electrolytes have enormous potential for the development of high energy density supercapacitors (SCs) owing to their wide potential windows, but ILs are plagued by sluggish ionic diffusion due to their high viscosity and large ion size. Exploiting superwettable electrodes possessing high compatibility with IL electrolytes remains challenging. Inspired by the biological characteristics observed in nature, a unique film electrode with a Monstera leaflike nanostructure is synthesized and used to overcome the aforementioned bottleneck. Similar to the pores in Monstera leaves that allow the permeation of air and water vapor, the film electrode is based on porous g-C 3 N 4 nanosheets (~1 nm thick) as ion-accessible "highway" channels, allowing ultrafast diffusion of IL ions. The film exhibits a high diffusion coefficient (3.68 × 10 −10 m 2 s −1 ), low activation energy (0.078 mJ mol −1 ) and extraordinary wettability in the IL electrolyte, indicating its superior IL ion dynamics. As a proof of concept, flexible ionogel SCs (FISCs) with tailorability and editability are fabricated, which exhibit a high energy density (10.5 mWh cm −3 ), high-power density, remarkable rate capability, and long-term durability, outperforming previously reported FISCs. Importantly, these FISCs can be effectively charged by harvesting sustainable power sources, particularly the rarely studied wind power, for practical applications.

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Section: Introductionmentioning

confidence: 99%

Boosting ion dynamics through superwettable leaf-like film based on porous g-C3N4 nanosheets for ionogel supercapacitors

et al. 2019

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“…The TC‐g‐C 3 N 4 /NiS//AC ASC exhibits high‐energy density of 27 Wh/kg at a power density of 379 W/kg. Compared with other reports, the electrode shows a relatively high‐energy density, including NiS@C//C (21.6 Wh/kg, 400 W/kg), 50 NiCo 2 S 4 nanosheets@g‐C 3 N 4 //AC (16.7 Wh/kg, 200 W/kg), 51 NiO//AC (21.4 Wh/kg, 375.8 W/kg), 52 NiS@CQDs‐CNTs‐rGO//graphene hydrogel (21 Wh/kg, 811 W/kg), 21 NiCoS/CC//AC (40 Wh/kg, 379 W/kg) 45 . Therefore, TC‐g‐C 3 N 4 /NiS electrode possesses potential application prospects in high‐performance supercapacitors.…”

Section: Resultsmentioning

confidence: 69%

Synthesis and enhanced supercapacitor performance of carbon self‐doping graphitic carbon nitride/NiS electrode material

et al. 2020

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The thermal oxidation carbon self-doped graphitic carbon nitride/NiS (TC-g-C 3 N 4 / NiS) composites with high electrochemical performance were synthesized by combining nickel sulfide with carbon self-doping carbon nitride through a hydrothermal method. The graphitic carbon nitride (g-C 3 N 4) could improve charge fluidity by carbon self-doping process, and be etched by further heat treatment, which provides conditions for the introduction of NiS particles. NiS particles uniformly adhered to the layers of g-C 3 N 4 , thus avoiding particle aggregation. The as-prepared active composite maintains high specific capacitance (1162 F/g at the current density of 1 A•g −1) and shows great cycle stability (capacitance retention rate of 82.0% after 8000 cycles). The conductivity of active composite has also been improved. Moreover, the assembled TC-g-C 3 N 4 /NiS//AC exhibit a relatively high-energy density of 27 Wh/kg and exhibits excellent cycling performance with a capacity retention rate of 87.9% after 8000 cycles. Hence one can see that TC-g-C 3 N 4 /NiS composites have broad application prospects in the field of supercapacitors.

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“…Figure a shows the CV curves for C@Ni 0.9 Cu 0.1 ‐S//AC asymmetric supercapacitor at different voltage windows from 1.0 to 1.8 V at a scan rate of 30 mV s –1 . The stable electrochemical window of asymmetrical supercapacitor can be extended to 1.6 V, and electrolysis water reactions occur at 1.8 V . Figure b shows the CV curves for C@Ni 0.9 Cu 0.1 ‐S//AC asymmetric supercapacitor at different scan rates.…”

Section: Resultsmentioning

confidence: 99%

One‐Step Hydrothermal Synthesis of Carbon‐Coated Nickel–Copper Sulfide Nanoparticles for High‐Performance Asymmetric Supercapacitors

Zheng

Wang

et al. 2019

Eur J Inorg Chem

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The C@Ni0.9Cu0.1‐S supercapacitor electrode material with good electrochemical performance was successfully prepared by a simple hydrothermal method. C@Ni0.9Cu0.1‐S obtained by adding glucose has better electrochemical performance than single Ni0.9Cu0.1‐S. In this work, the electrochemical properties of C@Ni0.9Cu0.1‐S electrode materials and asymmetric supercapacitors were studied in detail. This single‐electrode specific capacity in the 6 M KOH solution reaches 1986 F g–1 and the potential window is 0 to 0.49 V. In order to increase the energy density and potential window of the supercapacitor, C@Ni0.9Cu0.1‐S is used as a positive electrode, and AC is used as a negative electrode to assemble asymmetric supercapacitors. The results show that the working voltage of C@Ni0.9Cu0.1‐S∥ AC asymmetric supercapacitor increases to 1.6 V, and the specific capacitance and energy density can reach 184.4 F g–1 and 65.6 Wh kg–1, respectively, and has excellent cycling stability. These excellent electrochemical properties indicate that C@Ni0.9Cu0.1‐S is a promising supercapacitor electrode material.

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Nickel cobalt sulfide nanosheets uniformly anchored on porous graphitic carbon nitride for supercapacitors with high cycling performance

Cited by 109 publications

References 38 publications

Boosting ion dynamics through superwettable leaf-like film based on porous g-C3N4 nanosheets for ionogel supercapacitors

Boosting ion dynamics through superwettable leaf-like film based on porous g-C3N4 nanosheets for ionogel supercapacitors

Synthesis and enhanced supercapacitor performance of carbon self‐doping graphitic carbon nitride/NiS electrode material

One‐Step Hydrothermal Synthesis of Carbon‐Coated Nickel–Copper Sulfide Nanoparticles for High‐Performance Asymmetric Supercapacitors

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