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Composite material of flower-like carbon-loaded MoS2 nanoparticles and preparation method and application thereof

A technology of nano-particles and composite materials, applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve problems such as insufficient charge transfer, limited material and electrolyte contact area, etc., achieve good energy storage effect, enhance Electron conductivity, the effect of buffering structural stress

Inactive Publication Date: 2016-10-26
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some limitations in these works, such as insufficient charge transfer, limited contact area between materials and electrolyte.

Method used

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  • Composite material of flower-like carbon-loaded MoS2 nanoparticles and preparation method and application thereof
  • Composite material of flower-like carbon-loaded MoS2 nanoparticles and preparation method and application thereof
  • Composite material of flower-like carbon-loaded MoS2 nanoparticles and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Disperse 100 mg of the synthesized flower-like ZnO in 10 ml of deionized water, sonicate for 20 min, then add 100 mg of glucose, and sonicate for 10 min; then transfer the mixture to a pressure furnace and place it in an oven at 180°C for reaction 12 h; after naturally cooling to room temperature, the product was taken out and centrifuged and washed 5 times with absolute ethanol; then the product was dried in an oven at 60°C for 6 h.

[0027](2) Take 1.0 g of dried powder and place it in a tube furnace, heat it to 800 °C for 2 h at a heating rate of 5 °C / min under the protection of nitrogen; finally cool it to room temperature under the protection of gas. Then the heat-treated material was treated with 2 M HCl for 1 h, then centrifuged with deionized water and ethanol for several times, and dried in an oven at 60 °C to obtain flower-like carbon.

[0028] (3) Weigh 22 mg of ammonium tetrathiomolybdate and add it to 10 ml of DMF, sonicate for 10 minutes to fully disso...

Embodiment 2

[0031] Weigh 40 mg of ammonium tetrathiomolybdate and add it to 10 ml of DMF, ultrasonicate for 10 min to fully dissolve the ammonium tetrathiomolybdate; add 0.1 ml of hydrazine monohydrate, then transfer the mixture to a pressure vessel, place ℃ oven for 18 h; after natural cooling to room temperature, the material liquid was taken out and washed with deionized water for 6 times; Heat treatment for 2 h under the protection of nitrogen in the furnace to obtain the final MoS 2 Nanoparticle hydrogen evolution catalytic materials.

[0032] From Figure 6 It can be seen that ammonium tetrathiomolybdate itself solvothermally obtains a nano-flower-like structure.

Embodiment 3

[0034] (1) Disperse 100 mg of the synthesized flower-like ZnO in 10 ml of deionized water, sonicate for 20 min, then add 100 mg of glucose, and sonicate for 10 min; then transfer the mixture to a pressure furnace and place it in an oven at 180°C for reaction 24 h; after naturally cooling to room temperature, the product was taken out and washed with absolute ethanol for 5 times; then the product was dried in an oven at 60°C for 6 h.

[0035] (2) Take 1.0 g of dried powder and place it in a tube furnace, heat it to 800 °C for 2 h at a heating rate of 5 °C / min under the protection of nitrogen; finally cool it to room temperature under the protection of gas. Then the heat-treated material was treated with 2 M HCl for 1 h, then centrifuged with deionized water and ethanol for several times, and dried in an oven at 60 °C to obtain flower-like carbon.

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Abstract

The invention belongs to the field of energy storing materials, in particular to a composite material for flower-like carbon-loaded MoS2 nanoparticles and a preparation method and application thereof. The preparation method comprises the following steps: performing high-temperature thermal treatment and acid etching by taking flower-like ZnO as a template and taking biomass as a precursor through a simple hydrothermal method to obtain a flower-like carbon substrate; performing solvent thermal treatment on flower-like carbon and ammonium tetrathiomolybdate to obtain the composite material in which the MoS2 nanoparticles are uniformly loaded on the flower-like carbon. The prepared composite material has high energy storing capacity, superior cycling stability and superior rate capability when being taken as a negative electrode material of a lithium battery. Biomass with a wide source is taken as the flower-like precursor, and a hydrothermal and solvent-thermal two-step method is adopted; the composite material has the advantage of easiness in operation, low production cost, low environmental pollution, easiness in bath production and large-scale production, good industrial production basis and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and in particular relates to a lithium battery negative electrode material and a preparation method and application thereof. Background technique [0002] In the past decade, the rapid development of wearable electronic devices as well as electric vehicles has led to a large demand for lithium battery materials with high energy storage capacity and excellent cycle stability. However, the theoretical energy storage capacity of conventional commercial graphite electrodes is only 372 mAh g -1 , it is difficult to meet the rapidly growing demand for energy storage. Recently, molybdenum disulfide, as a typical chalcogenide transition metal compound, has attracted extensive attention due to its special two-dimensional S-Mo-S three-layer structure. Molybdenum disulfide is further stacked by these two-dimensional sheets through weak van der Waals force, and the distance between the she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/58H01M10/0525
CPCH01M4/36H01M4/5815H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 王雄伟武培怡
Owner FUDAN UNIV
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