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Graphene supported SbVO4 nanoparticle composite material and preparation method thereof

A nanoparticle and composite material technology, applied in the field of electrochemistry, can solve problems such as restricting development and application, poor cycle performance, low specific capacity, etc., and achieve the effects of improving structural stability, mild reaction conditions, and simple preparation process

Inactive Publication Date: 2019-03-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its low electronic conductivity and huge volume expansion during cycling lead to its low specific capacity and poor cycle performance, which restricts its further development and application.
Thereafter, on SbVO 4 There is relatively little research in the field of electrochemical energy storage

Method used

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  • Graphene supported SbVO4 nanoparticle composite material and preparation method thereof
  • Graphene supported SbVO4 nanoparticle composite material and preparation method thereof
  • Graphene supported SbVO4 nanoparticle composite material and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0034] (1) Preparation of electrode sheets

[0035] The end product that adopts embodiment to prepare gained is as active material, and acetylene black is as conductive additive, and sodium carboxymethylcellulose (CMC) is as binding agent, and the mass ratio of active material, acetylene black, CMC is 70:20:10; After they are fully mixed in proportion, a small amount of isopropanol is added, ground evenly, and evenly coated on copper foil; dried for 24 hours and cut into discs for later use.

[0036] (2) Assembly of Li-ion half-cells

[0037] With 1M LiPF 6 Dissolve in a mixed solution of ethylene carbonate (EC) and dimethyl carbonate (DMC) (the volume ratio of EC to DMC is 1:1) to obtain an electrolyte, the lithium sheet is the negative electrode, and the CR2032 stainless steel is assembled into a buckle for the battery case lithium-ion half-cell.

[0038] (3) Assembly of Na-ion half-cells

[0039] with 1M NaClO 4 Dissolve in a mixed solution of ethylene carbonate (EC) a...

Embodiment 1

[0042] A graphene-supported SbVO 4 A method for preparing a nanoparticle composite material, the steps of the method are as follows:

[0043] (1) 2mmol NH 4 VO3 Disperse the powder in 50mL deionized water, bath in 80℃ water until dissolved, and obtain a yellow transparent solution;

[0044] (2) 2mmol antimony trichloride hexahydrate (SbCl 3 ·6H 2 O) adding to the yellow transparent solution obtained in step (1), stirring and dispersing evenly to obtain a mixed dispersion;

[0045] (3) Add graphene oxide aqueous solution (the amount of graphene oxide is 52 mg) to the mixed dispersion obtained in step (2), stir and disperse evenly to obtain a suspension;

[0046] (4) Transfer the suspension obtained in step (3) to a 100mL polytetrafluoroethylene reactor, heat it in water at 180°C for 24h, and then cool it naturally to room temperature to obtain the crude product;

[0047] (5) The crude product obtained in step (4) was centrifugally washed twice with water and alcohol respec...

Embodiment 2

[0057] (1) 2mmol NH 4 VO 3 Disperse the powder in 50mL deionized water, bath in 80℃ water until dissolved, and obtain a yellow transparent solution;

[0058] (2) 1.8mmol antimony trichloride hexahydrate (SbCl 3 ·6H 2 O) adding to the yellow transparent solution obtained in step (1), stirring and dispersing evenly to obtain a mixed dispersion;

[0059] (3) Add graphene oxide aqueous solution (the amount of graphene oxide is 30mg) to the mixed dispersion liquid that step (2) obtains, stir and disperse evenly, obtain suspension;

[0060] (4) Transfer the suspension obtained in step (3) to a 100mL polytetrafluoroethylene reactor, heat it in water at 180°C for 26h, and then cool it down to room temperature naturally to obtain a crude product;

[0061] (5) Wash the product obtained in step (4) twice with water and alcohol, and dry at 80°C to obtain a graphene-supported SbVO 4 Nanoparticle composites.

[0062] The XRD result of final product shows, described composite material ...

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Abstract

The invention belongs to the field of electrochemical technology, and particularly relates to a graphene supported antimony vanadate nanoparticle composite material and a preparation method thereof. The graphene supported antimony vanadate nanoparticle composite material is prepared from the following materials in percentage by mass: 6 to 12 percent of graphene and 88 to 94 percent of antimony vanadate nanoparticles, totaling 100 percent, wherein the antimony vanadate nanoparticles are uniformly attached to a graphene sheet. The method comprises the following steps: separately dispersing NH4VO3 powder in deionized water; then adding antimony trichloride hexahydrate after dissolving, and stirring for uniform dispersion; finally adding a graphene oxide aqueous solution, stirring for uniformdispersion, transferring into a closed reactor for hydrothermal reaction, and washing and drying the crude product obtained. The material has excellent electrochemical performance, and shows high capacity and high rate performance when being applied to lithium ion batteries and sodium ion batteries. The method is simple in process, and easy for mass production.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, in particular to a graphene-supported SbVO 4 Nanoparticle composite materials and methods for their preparation. Background technique [0002] In recent years, with the continuous consumption of fossil energy and the increasing environmental pollution, the development and utilization of high-energy clean energy storage systems are particularly important. Electrochemical energy storage has attracted much attention due to its environmental friendliness. Among them, lithium-ion batteries are widely used in portable electronic devices and electric vehicles due to their excellent electrochemical performance, but their application in large-scale storage fields such as power grids is still restricted by their energy density. In addition, due to the limited storage of lithium metal on the earth, based on the long-term utilization of resources and cost considerations, sodium-ion batteries have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/62H01M10/0525
CPCH01M4/48H01M4/625H01M10/0525Y02E60/10
Inventor 陈人杰赵露滋谢嫚罗锐黄永鑫吴锋李丽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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