Facile one-step hydrothermal preparation of molybdenum disulfide/carbon composite for use in supercapacitor

Fan, Leqing; Liu, Gui-Jing; Zhang, Can Yang; Wu, Jihuai; Wei, Yuelin

doi:10.1016/j.ijhydene.2015.06.061

Cited by 189 publications

(66 citation statements)

References 53 publications

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“…There are no evident redox peaks in all the CV curves, which are similar to previous reports and indicative of the dominant EDLC capacitance feature [3,6,11,13]. The area covered by the CV curve of MoS 2 /RGO hollow microspheres is much larger than that enclosed by bare MoS 2 microspheres and bare RGO material, implying its enhanced capacitance [5,6]. The CV curves of MoS 2 /RGO hollow microspheres obtained at different scanning rates ranging from 5 to 100 mV·s −1 are displayed in Figure 7b.…”

Section: Resultssupporting

confidence: 89%

“…As shown in the Nyquist plots (Figure 7f) obtained from the EIS measurements of MoS 2 /RGO hollow microspheres and bare MoS 2 microspheres, each curve consists of an arc in the high-frequency region and a spike in the low-frequency region. The experimental data can be simulated by an equivalent circuit model (inset of Figure 7f), where R s represents the internal resistance, CPE1 is a constant phase element for the electric double-layer capacitance, R ct is the charge transfer resistance, Z w is the Warburg impedance [6,29]. R s is associated with the ionic resistance of electrolyte and electronic resistance of electrode, which is able to be deduced from the intersection of Nyquist plot on the real axis (Z’), while R ct is ascribed to the electrochemical process taking place at the interface of electrolyte/electrode, which can be directly obtained from the diameter of semicircular arc [6,29].…”

Section: Resultsmentioning

confidence: 99%

“…The experimental data can be simulated by an equivalent circuit model (inset of Figure 7f), where R s represents the internal resistance, CPE1 is a constant phase element for the electric double-layer capacitance, R ct is the charge transfer resistance, Z w is the Warburg impedance [6,29]. R s is associated with the ionic resistance of electrolyte and electronic resistance of electrode, which is able to be deduced from the intersection of Nyquist plot on the real axis (Z’), while R ct is ascribed to the electrochemical process taking place at the interface of electrolyte/electrode, which can be directly obtained from the diameter of semicircular arc [6,29]. The R s value is 1.35 Ω for MoS 2 /RGO hollow microspheres, which is lower than that of bare MoS 2 microspheres (2.04 Ω); the R ct value of MoS 2 /RGO hollow microspheres is 0.61Ω, which is also smaller than that of bare MoS 2 microspheres (1.85Ω).…”

Section: Resultsmentioning

confidence: 99%

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Simple Synthesis of Molybdenum Disulfide/Reduced Graphene Oxide Composite Hollow Microspheres as Supercapacitor Electrode Material

et al. 2016

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MoS2/RGO composite hollow microspheres were hydrothermally synthesized by using SiO2/GO microspheres as a template, which were obtained via the sonication-assisted interfacial self-assembly of tiny GO sheets on positively charged SiO2 microspheres. The structure, morphology, phase, and chemical composition of MoS2/RGO hollow microspheres were systematically investigated by a series of techniques such as FE-SEM, TEM, XRD, TGA, BET, and Raman characterizations, meanwhile, their electrochemical properties were carefully evaluated by CV, GCD, and EIS measurements. It was found that MoS2/RGO hollow microspheres possessed unique porous hollow architecture with high-level hierarchy and large specific surface area up to 63.7 m2·g−1. When used as supercapacitor electrode material, MoS2/RGO hollow microspheres delivered a maximum specific capacitance of 218.1 F·g−1 at the current density of 1 A·g−1, which was much higher than that of contrastive bare MoS2 microspheres developed in the present work and most of other reported MoS2-based materials. The enhancement of supercapacitive behaviors of MoS2/RGO hollow microspheres was likely due to the improved conductivity together with their distinct structure and morphology, which not only promoted the charge transport but also facilitated the electrolyte diffusion. Moreover, MoS2/RGO hollow microsphere electrode displayed satisfactory long-term stability with 91.8% retention of the initial capacitance after 1000 charge/discharge cycles at the current density of 3 A·g−1, showing excellent application potential.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Simple Synthesis of Molybdenum Disulfide/Reduced Graphene Oxide Composite Hollow Microspheres as Supercapacitor Electrode Material

et al. 2016

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“…The R s values of the NTs@C@Cu 2-x Se and Cu 2-x Se nanosheets are 0.21 and 0.35 Ω, respectively, which benefits the electrochemical reaction between the electrode and electrolyte. [56] The improved electrochemical performance of the CNTs@C@Cu 2-x Se can be ascribed to the unique structure. The Cu 2-x Se nanosphere is composed of smaller nanocrystalline, which promotes the reaction activity between the electrode and electrolyte, buffers the volume change during cycling compared with the crystalline large particles.…”

Section: Resultsmentioning

confidence: 99%

CNTs@C@Cu_2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors

et al. 2018

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In this work, one dimensional CNTs@C anchored with Cu2‐xSe nanospheres have been prepared by a facile solvothermal method. The parameters affected the morphology of the sample are investigated. When evaluated as anode for Li ion batteries, the obtained CNTs@C@Cu2‐xSe electrode delivers enhanced electrochemical performance with high reversible capacity, better cycle stability and rate capability. After 100th cycle, a discharge capacity of 399 mAh g−1 can be achieved at 0.1 A g−1. Even at high rate of 2 A g−1, the electrode can still keep a capacity of 198 mAh g−1 after 50 cycles. In addition, the obtained CNTs@C@Cu2‐xSe shows typical faradaic redox properties and exhibits excellent specific capacity (302.7 g−1 at 1 A g−1) and prominent cycling stability (86.9 % capacity retention after 2000 cycles at 2 A g−1). The enhanced electrochemical performance can be attributed to the unique structure. The Cu2‐xSe nanospheres consist of numerous nanocrystalline, which increases the contact area between Cu2‐xSe and electrolyte, reduces the pave length as well as accommodates volume change during cycling. The amorphous carbon layer with numerous carboxyl and hydroxyl groups strengthens the adhesion between the Cu2‐xSe and the CNTs. And the CNTs can enhance the conductivity of Cu2‐xSe and alleviate the mechanical stress and strain of the electrode during charge and discharge process.

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“…Moreover, mesoporous molybdenum disulfide/carbon (MoS 2 /C) nanocomposite was synthesised by facile hydrothermal route resulting in flower‐like morphologies. The resulting carbon‐decorated MoS 2 was an ideal electrode material for supercapacitors, being characterised by thinner MoS 2 nanosheets with increased specific surface area, thus, enhanced electrochemical properties, specific capacitance of 201.4 F g −1 with 0.2 Ag −1 of current density and long cyclic durability (which are higher than MoS 2 without C decoration).…”

Section: Synthetic Methodologies Of 2d Materialsmentioning

confidence: 99%

Chemical Functionalisation of 2D Materials by Batch and Continuous Hydrothermal Flow Synthesis

Alli

Hettiarachchi

Kellici

2020

Chemistry A European J

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2D materials are single or few layered materials consisting of one or several elements with a thickness of a few nanometres. Their unique, tuneable physical and chemical properties including ease of chemical functionalisation makes this class of materials useful in a variety of technological applications. The feasibility of 2D materials strongly depends on better synthetic approaches to improve properties, increase performance, durability and reduce costs. As such, in the synthesis of nanomaterials, hydrothermal processes are widely adopted through a precursor–product synthesis route. This method includes batch or continuous flow systems, both employing water at elevated temperatures (above boiling point) and pressures to fine‐tune the physical, chemical, optical and electronic properties of the nanomaterial. Both techniques yield particles with different morphology, size and surface area due to different mechanisms of particle formation. In this Minireview, we present batch and continuous hydrothermal flow synthesis of a selection of 2D derivatives (graphene, MXene and molybdenum disulfide), their chemical functionalisation as an advantageous approach in exploring properties of these materials as well as the benefits and challenges of employing these processes, and an outlook for further research.

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Facile one-step hydrothermal preparation of molybdenum disulfide/carbon composite for use in supercapacitor

Cited by 189 publications

References 53 publications

Simple Synthesis of Molybdenum Disulfide/Reduced Graphene Oxide Composite Hollow Microspheres as Supercapacitor Electrode Material

Simple Synthesis of Molybdenum Disulfide/Reduced Graphene Oxide Composite Hollow Microspheres as Supercapacitor Electrode Material

CNTs@C@Cu_2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors

Chemical Functionalisation of 2D Materials by Batch and Continuous Hydrothermal Flow Synthesis

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Facile one-step hydrothermal preparation of molybdenum disulfide/carbon composite for use in supercapacitor

Cited by 189 publications

References 53 publications

Simple Synthesis of Molybdenum Disulfide/Reduced Graphene Oxide Composite Hollow Microspheres as Supercapacitor Electrode Material

Simple Synthesis of Molybdenum Disulfide/Reduced Graphene Oxide Composite Hollow Microspheres as Supercapacitor Electrode Material

CNTs@C@Cu2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors

Chemical Functionalisation of 2D Materials by Batch and Continuous Hydrothermal Flow Synthesis

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Product

Resources

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CNTs@C@Cu_2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors