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Layered structure molybdenum disulfide/carbon composite material and preparation method and application thereof

A technology of carbon composite materials and molybdenum disulfide, applied in structural parts, secondary batteries, electrochemical generators, etc., can solve problems such as poor stability, achieve the effect of increasing layer spacing and improving electrochemical performance

Active Publication Date: 2017-02-15
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the composite material is a three-dimensional network structure composed of molybdenum disulfide and carbon, its -1 At a current density of 800 mAhg after only 30 cycles -1 Decay to 580mAg -1 , the stability is still poor

Method used

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  • Layered structure molybdenum disulfide/carbon composite material and preparation method and application thereof
  • Layered structure molybdenum disulfide/carbon composite material and preparation method and application thereof
  • Layered structure molybdenum disulfide/carbon composite material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0056] A layered structure molybdenum disulfide / carbon composite material, the composite material presents the morphology of nanosheets, the carbon material is between the laminates of the layered structure of molybdenum disulfide, and one or more layers of molybdenum disulfide Composite in-situ with the carbon layer in a layer-by-layer manner.

[0057] The preparation method of this composite material is as follows:

[0058] 1) Measure 30 mL of dodecylamine (analytical pure) and dissolve it in 200 mL of ethanol solvent. After the dodecylamine is fully dissolved, weigh 2 g of molybdenum trioxide (analytical pure) and add it to the above mixed solution, and stir in a water bath at 70 ° C. After reacting for 24 hours, a white precipitate was formed, which was filtered by suction and washed with ethanol solvent, and dried in vacuum at 70°C for 48 hours to obtain a dodecylamine-intercalated molybdenum trioxide organic / inorganic hybrid;

[0059] 2) Take 0.5g of dodecylamine-interc...

Embodiment 2

[0066] A layered structure molybdenum disulfide / carbon composite material, the composite material presents the morphology of nanosheets, the carbon material is between the laminates of the layered structure of molybdenum disulfide, and one or more layers of molybdenum disulfide Composite in-situ with the carbon layer in a layer-by-layer manner.

[0067] The preparation method of this composite material is as follows:

[0068] 1) Measure 1 mL of ethylenediamine (analytical pure) and dissolve it in 30 mL of ethanol solvent. After the ethylenediamine is fully dissolved, weigh 0.37 g of molybdenum trioxide (analytical pure) and add it to the above mixed solution. Stirring and reacting for 24 hours, a white precipitate was formed, which was filtered with suction and washed with ethanol solvent, and vacuum-dried at 60°C for 24 hours to obtain a molybdenum trioxide organic / inorganic hybrid intercalated with ethylenediamine;

[0069] 2) Take 0.5 g of molybdenum trioxide organic / inorg...

Embodiment 3

[0072] A layered structure molybdenum disulfide / carbon composite material, the composite material presents the morphology of nanosheets, the carbon material is between the laminates of the layered structure of molybdenum disulfide, and one or more layers of molybdenum disulfide Composite in-situ with the carbon layer in a layer-by-layer manner.

[0073] The preparation method of this composite material is as follows:

[0074] 1) Dissolve 5 mL of n-octylamine (analytical pure) in 100 mL of propanol solvent. After the n-octylamine is fully dissolved, weigh 0.50 g of molybdenum trioxide (analytical pure) and add it to the above mixed solution. The reaction was stirred in medium temperature for 36 h, and a white precipitate was formed. The filter cake was filtered by suction and washed with propanol solvent, and vacuum-dried at 70 °C for 24 h to obtain a molybdenum trioxide organic / inorganic hybrid intercalated with n-octylamine;

[0075] 2) Take 0.2g of n-octylamine-intercalated...

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Abstract

The invention discloses a preparation method of a layered structure molybdenum disulfide / carbon composite material and an application. The composite material is prepared by adopting a molybdenum oxide organic / inorganic hybrid compound of an organic amine intercalation layer as a precursor, putting the precursor into a high-temperature area, putting a sulfur source into a low-temperature area and simultaneously carrying out high-temperature vulcanization and carbonization treatment under inert gas protection. The composite material has a layered structure; carbon is located between laminated plates of a few of molybdenum disulfide layers; the composite material can serve as an electronic transmission channel to improve the conductivity of the electrode material; and furthermore, the interlayer distance is expanded and the diffusion ability of Li<+>between the layers is improved. The composite electrode material has relatively high specific capacity and good cycle performance and rate capability, and is simple in process and low in raw material cost; and large-scale industrial production is easy to implement.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery electrode materials and preparation thereof. More specifically, it relates to a layered structure molybdenum disulfide / carbon composite electrode material and its preparation method. The molybdenum disulfide / carbon composite material with sheet structure is synthesized by the method of intercalation-carbonization and sulfidation. Background technique [0002] Lithium-ion battery is a high-energy secondary battery, because it has high energy density, high working voltage, wide temperature range, good cycle life, high cleanliness and environmental protection, and low self-discharge rate during use. It is favored by the market due to its good performance and other advantages. At present, lithium-ion batteries have been widely used in portable electronic products such as mobile phones, notebook computers, mobile Internet devices, video cameras and digital cameras, and are widely used in n...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/58H01M10/0525
CPCH01M4/366H01M4/5815H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 杨占旭杜金龙
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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