Ultrathin MoS2 nanosheets tightly anchoring onto nitrogen-doped graphene for enhanced lithium storage properties

Xia, Saisai; Wang, Yirui; Liu, Yi; Wu, Chenghao; Wu, Minghong; Zhang, Haijiao

doi:10.1016/j.cej.2017.09.105

Cited by 99 publications

(38 citation statements)

References 55 publications

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“…f. Polyethylenimine, [83] as the source agent and the control agent, could provide nitrogen source, control the morphology of MoS 2 and tune the electrochemical properties of MoS 2 /N-graphene based composites. The composites showed high reversible capacity and superior rate capability and could be used for lithium batteries.…”

Section: Hydrothermal Techniquementioning

confidence: 99%

“…[87] MoS 2 nanosheets could be vertically grown onto graphene (Figure 6f and g), which could generate a distinct honeycomb-like hybrid structure, with strong interaction, thus boosting the charge transfer. [83] This structure offered strong electrical and chemical coupling between MoS 2 and graphene via C-O-Mo bonding, which would enhance high-efficiency electron/ion transport pathway and structural stability. The nanotile-like MoS 2 sheets could also facilitate lithium ion insertion/extraction and electrolyte access, due to more edges existing in the structure.…”

Section: Lithium-ion Batteriesmentioning

confidence: 99%

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MoS₂/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

Wang

Tran

Qian

et al. 2019

Adv Materials Inter

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Energy storage devices with high performance have been extensively studied for decades due to the increasing fuel demands. The physicochemical properties of 2D materials such as MoS 2 and graphene, due to their high surface area, versatile electronic structure, high mechanical robustness, This article is protected by copyright. All rights reserved. 2 high electrical conductivity, and desirable electrochemical characteristics, make them superior candidates for energy storage applications. MoS 2 /graphene composites specially emerge as exceptional candidates that could offer new solution for energy storage applications. Many fabrication strategies to develop and synthesize MoS 2 /graphene composites have been explored and introduced, such as hydrothermal and solvothermal treatment, chemical vapor deposition, sonication, microwave and self-assembly. For these composites to be suitable for energy storage devices applications, they are often integrated with other materials such as additional agents to improve their electrochemical and stability properties. In this review, recent progresses on the development of graphene/MoS 2 composites for energy storage and conversion applications (supercapacitors, batteries, solar cells, and hydrogen evolution) is presented and discussed. Critical review and perspectives on the future directions for MoS 2 /graphene composite based energy storage devices are also presented as concluding remarks. Recent progress on the development of graphene/MoS 2 composites for energy storage applications is also presented and discussed.

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Section: Hydrothermal Techniquementioning

confidence: 99%

Section: Lithium-ion Batteriesmentioning

confidence: 99%

MoS₂/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

Wang

Tran

Qian

et al. 2019

Adv Materials Inter

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“…which relates the measured peak current (i) to the scan rate (ν), a and b are adjustable parameters. [25] The b value can be determinate by fitting log(i) versus log(ν) (FigureS2). [26] In general, b = 1 entails a capacitive surface-limited process, while b = 0.5 implies a semi-infinite linear diffusion-controlled mechanism.…”

Section: Characterizationsmentioning

confidence: 99%

“…[26] In general, b = 1 entails a capacitive surface-limited process, while b = 0.5 implies a semi-infinite linear diffusion-controlled mechanism. [25][26][27] For the cathodic peak at ~1.8 V and the anodic peak ~2.4 V b values of 0.827 and 0.696 were calculated, respectively. Those values indicate a higher capacitive contribution in the case of the reduction process compared to the oxidation analogue.…”

Section: Characterizationsmentioning

confidence: 99%

Flexible freestanding MoS₂ based paper-like material for energy conversion and storage

Zoller¹,

Bein²,

Fattakhova‐Rohlfing³

et al. 2019

Preprint

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Construction of flexible electrochemical devices for energy storage and generation is of utmost importance in the modern society. In this article, we report the synthesis of flexible MoS2 based composite paper by high-energy shear force milling and simple vacuum filtration. This composite material combines high flexibility, mechanical strength and good chemical stability. Chronopotentiometric charge-discharge measurements were used to determine the capacitance of our paper material. Highest capacitance of 33 mF cm-2 was achieved at current density of 1 mA cm-2 showing potential application in supercapacitors. We further used the material as a cathode for hydrogen evolution reaction (HER) with an onset potential of ca. -0.2 V vs RHE. The onset potential was even lower (ca. -0.1 V vs RHE) after treatment with n-butyllithium suggesting the introduction of new active sites. Finally, a potential use in Lithium ion batteries (LIB) was examined. Our material can be used directly without any binder, additive carbon or copper current collector and delivers specific capacity of 740 mA h g-1 at a current density of 0.1 A g-1. After 40 cycles at this current density the material still reached a capacity retention of 91%. Our findings show that this composite material could find application in electrochemical energy storage and generation devices where high flexibility and mechanical strength are desired.

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“…Since graphene’s initial discovery [ 1 ], two-dimensional (2D) transition metal dichalcogenide semiconductors (TMD) have attracted great research interest for their unique electronic and optical characteristics, which are distinctively different from those of their bulk materials [ 2 , 3 , 4 , 5 , 6 ]. MoS 2 is the most popular member of the series, which compensates for the disadvantage caused by the absence of a band gap of graphene, and shows considerable anisotropy due to its large intrinsic band gap, resulting in novel electronic, optical, mechanical, and structural characteristics [ 7 , 8 , 9 , 10 , 11 ]. In many applications, such as batteries, composites, sensors, and catalytic activities, MoS 2 needs to be produced on a large-scale, and preferably at a lower cost.…”

Section: Introductionmentioning

confidence: 99%

Direct Exfoliation of Natural SiO2-Containing Molybdenite in Isopropanol: A Cost Efficient Solution for Large-Scale Production of MoS2 Nanosheetes

et al. 2018

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The cost-effective exfoliation of layered materials such as transition metal dichalcogenides into mono- or few- layers is of significant interest for various applications. This paper reports the preparation of few-layered MoS2 from natural SiO2-containing molybdenite by exfoliation in isopropanol (IPA) under mild ultrasonic conditions. One- to six-layer MoS2 nanosheets with dimensions in the range of 50-200 nm are obtained. By contrast, MoS2 quantum dots along with nanosheets are produced using N-methyl-pyrrolidone (NMP) and an aqueous solution of poly (ethylene glycol)-block-poly (propylene glycol)-block-poly (ethylene glycol) (P123) as exfoliation solutions. Compared with molybdenite, commercial bulk MoS2 cannot be exfoliated to nanosheets under the same experimental conditions. In the exfoliation process of the mineral, SiO2 associated in molybdenite plays the role of similar superfine ball milling, which significantly enhances the exfoliation efficiency. This work demonstrates that isopropanol can be used to exfoliate natural molybdenite under mild conditions to produce nanosheets, which facilitates the preparation of highly concentrated MoS2 dispersions or MoS2 in powder form due to the volatility of the solvent. Such exfoliated MoS2 nanosheets exhibit excellent photoconductivity under visible light. Hence, the direct mild exfoliation method of unrefined natural molybdenite provides a solution for low-cost and convenient production of few-layered MoS2 which is appealing for industrial applications.

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Ultrathin MoS2 nanosheets tightly anchoring onto nitrogen-doped graphene for enhanced lithium storage properties

Cited by 99 publications

References 55 publications

MoS₂/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

MoS₂/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

Flexible freestanding MoS₂ based paper-like material for energy conversion and storage

Direct Exfoliation of Natural SiO2-Containing Molybdenite in Isopropanol: A Cost Efficient Solution for Large-Scale Production of MoS2 Nanosheetes

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Ultrathin MoS2 nanosheets tightly anchoring onto nitrogen-doped graphene for enhanced lithium storage properties

Cited by 99 publications

References 55 publications

MoS2/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

MoS2/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

Flexible freestanding MoS2 based paper-like material for energy conversion and storage

Direct Exfoliation of Natural SiO2-Containing Molybdenite in Isopropanol: A Cost Efficient Solution for Large-Scale Production of MoS2 Nanosheetes

Contact Info

Product

Resources

About

MoS₂/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

MoS₂/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

Flexible freestanding MoS₂ based paper-like material for energy conversion and storage