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Accordion-shaped VS2 material as well as preparation method and application thereof

An accordion and nanosheet technology, applied in the fields of nanomaterials and electrochemistry, to achieve the effects of enhanced stability, good long-life performance, and high rate performance

Active Publication Date: 2016-09-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By controlling the charge-discharge cut-off voltage, the VS 2 Becoming an embedded anode material with high ionic and electronic conductivity and lower voltage platform has not been reported

Method used

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  • Accordion-shaped VS2 material as well as preparation method and application thereof
  • Accordion-shaped VS2 material as well as preparation method and application thereof
  • Accordion-shaped VS2 material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Accordion VS 2 The preparation method of material, it comprises the following steps:

[0035] 1) Take a certain amount of ammonia solution and disperse it in deionized water. The concentration of ammonia in the homogeneous mixed solution is 1.7mmol mL -1 , stir until uniform;

[0036] 2) Slowly add a certain amount of polyvinylpyrrolidone (PVP K-30) to the solution obtained in step 1), stir magnetically until it is completely dissolved, and its concentration in the aqueous solution is 0.033g mL -1 ;

[0037] 3) Slowly add a certain amount of NH to the solution obtained in step 2) 4 VO 3Powder, magnetically stirred until completely dissolved, its concentration in aqueous solution is 0.067mmol mL -1 ;

[0038] 4) Slowly add an appropriate amount of thioacetamide (TAA) to the solution obtained in step 3) according to the vanadium / sulfur molar ratio of 1 / 10, and magnetically stir until completely dissolved;

[0039] 5) Transfer the solution obtained in step 4) to a p...

Embodiment 2

[0045] Accordion VS 2 The preparation method of material, it comprises the following steps:

[0046] 1) Take a certain amount of ammonia solution and disperse it in deionized water, stir until uniform, the concentration of ammonia water in the uniform mixed solution is 3.5mmol mL -1 ;

[0047] 2) Slowly add a certain amount of polyvinylpyrrolidone (PVP K-30) powder into the solution obtained in step 1), stir magnetically until it is completely dissolved, and its concentration in the aqueous solution is 0.067g mL -1 ;

[0048] 3) Slowly add a certain amount of NH to the solution obtained in step 2) 4 VO 3 Powder, magnetically stirred until completely dissolved, its concentration in aqueous solution is 0.067g mL -1 ;

[0049] 4) Slowly add an appropriate amount of thioacetamide (TAA) to the solution obtained in step 3) according to the vanadium / sulfur molar ratio of 1 / 10, and magnetically stir until completely dissolved;

[0050] 5) Transfer the solution obtained in step ...

Embodiment 3

[0055] Accordion VS 2 The preparation method of material, it comprises the following steps:

[0056] 1) Take a certain amount of ammonia solution and disperse it in deionized water, stir until uniform, the concentration of ammonia water in the uniform mixed solution is 3.5mmol mL -1 ;

[0057] 2) Slowly add a certain amount of polyvinylpyrrolidone (PVP K-30) powder into the solution obtained in step 1), stir magnetically until it is completely dissolved, and its concentration in the aqueous solution is 0.067g mL -1 ;

[0058] 3) Slowly add a certain amount of NaVO in the solution obtained in step 2) 3 Powder, magnetically stirred until completely dissolved, its concentration in aqueous solution is 0.067mmol mL -1 ;

[0059] 4) Slowly add an appropriate amount of thioacetamide (TAA) to the solution obtained in step 3) according to the vanadium / sulfur molar ratio of 1 / 15, and magnetically stir until completely dissolved;

[0060] 5) Transfer the solution obtained in step 4...

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Abstract

The invention belongs to the technical field of nanometer materials and electrochemistry and particularly relates to an accordion-shaped VS2 material as well as a preparation method and application thereof. The accordion-shaped VS2 material can be taken as an anode active material of a long-life and high-magnification sodium-ion battery and comprises a nanoparticle formed by regular stacking of a plurality of VS2 nanometer subunit nanosheets, and gaps are formed among the nanosheets to form a similar accordion-shaped stereoscopic structure; and the length of the nanoparticle is 1-1.5 microns, the width of the nanoparticle is 500nm-800nm, and the thickness of the single nanometer subunit nanosheet is 30nm-35nm. The preparation method has the beneficial effects that the accordion-shaped VS2 material is successfully synthesized by virtue of a high-temperature water method and a high-temperature sintering method; and when being used as the anode active material of an embedded sodium-ion battery, the accordion-shaped VS2 material presents excellent high magnification rate performance, cycling stability and long life and is a potential application material for the high-power and long-life sodium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to an accordion-shaped VS 2 A material and a preparation method thereof, the material can be used as a long-life, high-rate sodium-ion battery negative electrode active material. Background technique [0002] Various technical applications of energy storage, such as portable devices such as mobile phones, digital cameras, and notebook computers, electric vehicles, hybrid electric vehicles, and large-scale energy storage systems have attracted widespread attention. In order to drive these large-scale energy devices, battery materials with high energy density and high power density are urgently needed to be developed. Lithium-ion batteries, which are widely studied at present, are expensive due to the limited reserves of lithium in the earth's crust, resulting in high battery costs. Na-ion batteries have the advantages of abundant sodium resour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/054
CPCH01M4/5815H01M10/054Y02E60/10
Inventor 安琴友孙睿敏魏湫龙麦立强
Owner WUHAN UNIV OF TECH
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