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Preparation method of molybdenum disulfide nanosheet/graphene lithium battery anode material

A molybdenum disulfide and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unstable structure and complicated preparation process, and achieve the effects of avoiding stacking, simple process and good dispersion.

Active Publication Date: 2016-12-14
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, molybdenum disulfide nanosheet composites are mostly prepared by chemical synthesis, and the preparation process is complicated and the structure is unstable.

Method used

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  • Preparation method of molybdenum disulfide nanosheet/graphene lithium battery anode material
  • Preparation method of molybdenum disulfide nanosheet/graphene lithium battery anode material
  • Preparation method of molybdenum disulfide nanosheet/graphene lithium battery anode material

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Embodiment 1

[0036] Example 1: Preparation of molybdenum disulfide nanosheet / graphene composite material and electrochemical performance test

[0037] Preparation of molybdenum disulfide nanosheets / graphene composites

[0038] The present invention is a method for preparing molybdenum disulfide nanosheet / graphene lithium-ion battery negative electrode material, that is, a liquid phase physical method for preparing molybdenum disulfide nanosheet / graphene lithium-ion battery negative electrode material, see Figure 4 As shown, its implementation steps are as follows:

[0039] Step 1: Weigh 40 mg of surface modifier cetyltrimethylammonium bromide (CTAB), add 40 mL of deionized water, and stir vigorously for 12 hours to fully dissolve the surface modifier in water to obtain The solution of molybdenum nanosheet (CTAB mass ratio is 0.1%);

[0040] Step 2: Take by weighing 400mg molybdenum disulfide powder (particle size is less than 325 mesh) and stir until it is uniformly dispersed to obtain ...

Embodiment 2 2

[0050] Example 2 Preparation of Molybdenum Disulfide Nanosheet / Graphene Composite Material and Electrochemical Performance Test

[0051] Preparation of molybdenum disulfide nanosheets / graphene composites

[0052] Step 1: Weigh 40 mg of surface modifier TX-100, add 40 mL of deionized water, and stir vigorously for 12 hours to fully dissolve the surface modifier in water to obtain a solution for preparing molybdenum disulfide nanosheets (the mass of TX-100 than 0.1%);

[0053] Step 2: Take by weighing 400mg molybdenum disulfide powder (particle size is less than 325 mesh) and stir until it is uniformly dispersed to obtain a molybdenum disulfide powder dispersion (molybdenum disulfide powder mass ratio 1%); weigh 200mg graphite powder (particle size is less than 325 mesh ) is stirred until it is uniformly dispersed to obtain a graphite powder dispersion (graphite powder mass ratio 1%);

[0054] Step 3: Step 3: Put the molybdenum disulfide dispersion and the graphite dispersion ...

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Abstract

The invention discloses a preparation method of a molybdenum disulfide nanosheet / graphene lithium battery anode material. The preparation method comprises the following steps: firstly, dissolving a surface modification agent into deionized water in proportion to obtain a solution; secondly, uniformly dispersing molybdenum disulfide powder and graphene powder into the solution respectively; thirdly, carrying out jet flow cavitation treatment on a dispersion liquid of the molybdenum disulfide powder and a dispersion liquid of the graphene powder respectively; fourthly, carrying out centrifugal separation treatment on obtained solutions respectively; fifthly, standing the solutions for a period of time respectively, and taking supernatant liquids thereof; sixthly, uniformly mixing the supernatant liquid of molybdenum disulfide nanosheets and the supernatant liquid of graphene; seventhly, carrying out vacuum filtration and drying to obtain gray powder; and eighthly, calcining the gray powder, namely obtaining a molybdenum disulfide nanosheet / graphene composite material. The method is simple, the dispersion of the molybdenum disulfide nanosheets and the graphene is uniform, secondary dispersion of the molybdenum disulfide nanosheets prepared with a liquid phase method in the using process is avoided, the disadvantages that the molybdenum disulfide nanosheets are low in electrical conductivity and easy to pile up are overcome, and the performance of the lithium ion battery anode material is improved.

Description

Technical field: [0001] The invention provides a method for preparing a molybdenum disulfide nanosheet / graphene lithium-ion battery negative electrode material, which relates to a liquid-phase physical method for preparing a molybdenum disulfide nanosheet / graphene lithium-ion battery negative electrode material, specifically on the surface A technology for preparing molybdenum disulfide nanosheet / graphene composites in an aqueous modifier solution and using them as anode materials for lithium-ion batteries. The invention belongs to the new application field of preparing molybdenum disulfide nanosheets as lithium ion battery materials by a liquid phase physical method. Background technique: [0002] Due to the advantages of high open circuit voltage, long cycle life, high energy density, low self-discharge, and no memory effect, lithium-ion batteries dominate the portable power supply. In order to meet the requirements of miniaturization of electronic equipment and high powe...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/364H01M4/5815H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 沈志刚刘虹张晓静
Owner BEIHANG UNIV