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Graphene-modified vanadium disulfide micrometer flower material, preparation method thereof and application of graphene-modified vanadium disulfide micrometer flower material as aluminum ion battery cathode material

A technology of vanadium disulfide nanometer and vanadium disulfide, which is applied in battery electrodes, electrode heat treatment, circuits, etc., can solve the problems of unreported vanadium disulfide electrode materials, and achieve market promotion, short synthesis time, and good coulombic efficiency Effect

Inactive Publication Date: 2017-12-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, various two-dimensional metal sulfide materials have been studied as anode materials for aluminum ion batteries, but graphene-modified vanadium disulfide electrode materials have not been reported yet.

Method used

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  • Graphene-modified vanadium disulfide micrometer flower material, preparation method thereof and application of graphene-modified vanadium disulfide micrometer flower material as aluminum ion battery cathode material
  • Graphene-modified vanadium disulfide micrometer flower material, preparation method thereof and application of graphene-modified vanadium disulfide micrometer flower material as aluminum ion battery cathode material
  • Graphene-modified vanadium disulfide micrometer flower material, preparation method thereof and application of graphene-modified vanadium disulfide micrometer flower material as aluminum ion battery cathode material

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Effect test

Embodiment 1

[0032] The preparation method of graphene-modified vanadium disulfide cathode material comprises the following steps:

[0033] 1) Add 2mmol ammonium metavanadate and 2ml ammonia water to 30ml deionized water, stir until completely dissolved, and obtain a light yellow mixed solution;

[0034] 2) Add 20 mmol thioacetamide solution to the solution obtained in step 1), and continue stirring for one hour;

[0035] 3) Transfer the mixed solution obtained in step 2) to a reactor, heat the reaction, take out the reactor, and cool to room temperature naturally;

[0036] 4) The product obtained in step 3) is centrifuged and washed 4 times with absolute ethanol, and dried in an oven at 85° C. to obtain vanadium disulfide microflowers;

[0037] 5) Mixing and stirring the vanadium disulfide micron flowers and graphene obtained in step 4) for 12 hours at 10:1 (mass ratio) to obtain a black mixed solution;

[0038] 6) Centrifugally wash the solution obtained in step 5), and then put it int...

Embodiment 2

[0042] The preparation method of the vanadium disulfide micron flower cathode material modified by graphene comprises the following steps:

[0043] 1) Add 2 mmol of ammonium metavanadate and 2 ml of ammonia water to 30 ml of deionized water and stir for 15 minutes to obtain a pale yellow mixed solution.

[0044] 2) Add 20 mmol of thioacetamide solution to the solution obtained in step 1), and continue stirring for one hour.

[0045] 3) Transfer the mixed solution obtained in step 2) into a reaction kettle, heat the reaction, take out the reaction kettle, and naturally cool to room temperature.

[0046] 4) The product obtained in step 3) is centrifuged and washed 4 times with anhydrous ethanol, and dried in an oven at 80° C. to obtain vanadium disulfide microflowers.

[0047] 5) Mix and stir the vanadium disulfide micron flowers obtained in step 4) and graphene at a ratio of 5:1 (mass ratio) for 12 hours to obtain a black mixed solution.

[0048] 6) The solution obtained in ste...

Embodiment 3

[0051] The preparation method of the vanadium disulfide micron flower cathode material modified by graphene comprises the following steps:

[0052] 1) Add 2 mmol of ammonium metavanadate and 2 ml of ammonia water to 30 ml of deionized water and stir for 15 minutes to obtain a pale yellow mixed solution.

[0053] 2) Add 20 mmol of thioacetamide solution to the solution obtained in step 1), and continue stirring for one hour.

[0054] 3) Transfer the mixed solution obtained in step 2) into a reaction kettle, heat the reaction, take out the reaction kettle, and naturally cool to room temperature.

[0055] 4) The product obtained in step 3) is centrifuged and washed 4 times with anhydrous ethanol, and dried in an oven at 80° C. to obtain vanadium disulfide microflowers.

[0056] 5) Mix and stir the vanadium disulfide obtained in step 4) and graphene at 20:1 (mass ratio) for 12 hours to obtain a black mixed solution.

[0057] 6) Centrifuge the solution obtained in step 5) and put...

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Abstract

The invention relates to a graphene-modified vanadium disulfide micrometer flower material and a preparation method thereof. The graphene-modified vanadium disulfide micrometer flower material can be used as an aluminum ion battery cathode active material, and has a micrometer flower laminated structure which is self assembled by vanadium disulfide nanometer sheets, wherein graphene is uniformly distributed in the micrometer flower laminated structure, an interlayer distance of the micrometer flower laminated structure is shown in the description, and the diameter of a micrometer flower is 1-1.5 microns. The graphene-modified vanadium disulfide micrometer flower material and the preparation method thereof have the beneficial effects that the novel laminated graphene-modified vanadium disulfide electrode material is prepared through a one-step hydrothermal method, expresses high specific capacity, good cycle performance and good coulombic efficiency by larger interlayer distance of the vanadium disulfide and uniform interlayer modification on graphene when being used as the aluminum ion battery cathode active material, and is a potential application material of an aluminum ion battery; and secondly, the preparation method has the advantages of simple process, short synthesis time and mild conditions, meets the requirement on green chemistry, and is beneficial to market popularization.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and electrochemical devices, and in particular relates to a graphene-modified vanadium disulfide micron flower material and a preparation method thereof, which can be used as the positive electrode active material of an aluminum ion battery. Background technique [0002] Lithium-ion batteries are currently the most widely used commercial energy storage batteries. In the past decade, their performance has been significantly improved and they have been successfully used in electric vehicles. However, its shortcomings such as the safety of the organic electrolyte, the cost of the positive electrode material, and the limited charge-discharge capacity have drawn attention to rechargeable battery systems other than lithium-ion. [0003] Due to the higher theoretical volume capacity and relatively high mass capacity of aluminum-ion batteries, and aluminum is the most abundant metal element in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/58
CPCH01M4/04H01M4/0471H01M4/5815Y02E60/10
Inventor 麦立强吴璐孙睿敏裴存原安琴友
Owner WUHAN UNIV OF TECH
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