V2O5 hollow micron wire ball with nano wire three-dimensional winding structure and preparation method and application thereof

A nanowire and three-dimensional technology, applied in the field of V2O5 hollow micro-wire sphere and its preparation, can solve the problems of agglomeration and low tap density, and achieve the effects of improving tap density, mild reaction conditions and shortening diffusion distance.

Active Publication Date: 2015-12-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these nanomaterials have the disadvantages of low tap density and agglomeration during the cycle.

Method used

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  • V2O5 hollow micron wire ball with nano wire three-dimensional winding structure and preparation method and application thereof
  • V2O5 hollow micron wire ball with nano wire three-dimensional winding structure and preparation method and application thereof
  • V2O5 hollow micron wire ball with nano wire three-dimensional winding structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] V with nanowire three-dimensional winding structure 2 o 5 The preparation method of hollow micron wire ball, it comprises the steps:

[0038] 1) Measure 0.5mmol of V 2 o 5 Sol and add deionized water to dilute to 10mL;

[0039] 2) In the solution obtained in step 1), add 50 mL of isopropanol as a solvent;

[0040] 3) Add 2.0 g of tris to the solution obtained in step 2), and sonicate for 30 minutes;

[0041] 4) Transfer the reactants obtained in step 3) into a reactor for hydrothermal reaction at 200°C for 2 hours, take out the reactor, and cool naturally to room temperature;

[0042] 5) Centrifugally filter the product obtained in step 4), wash with absolute ethanol for 3-5 times, and dry in an oven to obtain a blue precursor powder;

[0043] 6) Put the product obtained in step 5) in a muffle furnace for calcination at 400°C for 5 hours to obtain V 2 o 5 Hollow micron wire balls.

[0044] Such as Figure 4As shown, the synthesis mechanism of the present inven...

Embodiment 2

[0049] V with nanowire three-dimensional winding structure 2 o 5 The preparation method of hollow micron wire ball, it comprises the steps:

[0050] 1) Measure 0.3mmol of V 2 o 5 Sol and add deionized water to dilute to 10mL;

[0051] 2) In the solution obtained in step 1), add 50 mL of isopropanol as a solvent;

[0052] 3) Add 1.0 g of tris to the solution obtained in step 2), and sonicate for 30 minutes;

[0053] 4) Transfer the reactants obtained in step 3) into a reactor for hydrothermal reaction at 200°C for 24 hours, take out the reactor, and cool to room temperature naturally;

[0054] 5) Centrifugally filter the product obtained in step 4), wash with absolute ethanol for 3-5 times, and dry in an oven to obtain a blue precursor powder;

[0055] 6) Put the product obtained in step 5) in a muffle furnace for calcination at 400°C for 5 hours to obtain V 2 o 5 Hollow micron wire balls.

[0056] With the V 2 o 5 Hollow micron wire balls are taken as an example. Wh...

Embodiment 3

[0058] V with nanowire three-dimensional winding structure 2 o 5 The preparation method of hollow micron wire ball, it comprises the steps:

[0059] 1) Measure 0.5mmol of V 2 o 5 Sol and add deionized water to dilute to 10mL;

[0060] 2) In the solution obtained in step 1), add 40 mL of isopropanol as a solvent;

[0061] 3) Add 2.0 g of tris to the solution obtained in step 2), and sonicate for 30 minutes;

[0062] 4) Transfer the reactants obtained in step 3) into a reactor for hydrothermal reaction at 220°C for 1 hour, take out the reactor, and cool naturally to room temperature;

[0063] 5) Centrifugally filter the product obtained in step 4), wash with absolute ethanol for 3-5 times, and dry in an oven to obtain a blue precursor powder;

[0064] 6) The product obtained in step 5) is placed in a muffle furnace and calcined at 425°C for 3 hours to obtain a V 2 o 5 Hollow micron wire balls.

[0065] With the V 2 o 5 Hollow micron wire balls are taken as an example....

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Abstract

The invention relates to a V2O5 hollow micron wire ball with a nano wire three-dimensional winding structure and a preparation method thereof. The method comprises the following steps: (1) measuring V2O5 gel, and diluting in deionized water to obtain a solution; (2) adding an organic solution into the solution obtain in the step (1) to obtain a solvent; (3) adding trihydroxymethyl aminomethane into the solution obtained in the step (2), and performing ultrasonic treatment for 0.5-2 hours; (4) transferring reactants obtained in the step (3) into a reaction kettle for hydrothermal reaction, taking out the reactants from the reaction kettle, and naturally cooling to room temperature; (5) centrifugally filtering the obtained products, washing by absolute ethyl alcohol, and drying in a drying box to obtain blue precursor powder; (6) putting the products obtained in the step (5) into a muffle furnace for calcining to obtain the V2O5 hollow micron wire ball. The V2O5 hollow micron wire ball has the beneficial effects of excellent circulating stability and good high-magnification characteristic, and is a potential application material for a lithium ion battery with high magnification and long life.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and specifically relates to a V with a three-dimensional winding structure of nanowires 2 o 5 A hollow micron wire ball and a preparation method thereof, the material can be used as a high-rate lithium-ion battery cathode active material. Background technique [0002] Lithium-ion batteries have been widely used in the field of energy storage due to their high operating voltage, high energy density and long service life. However, its application in large-scale energy storage such as electric vehicles is still limited by its rate performance and power density. These can be achieved by constructing electrode materials with special structures. In the positive electrode material, the V of the layered structure 2 o 5 Due to the reversible deintercalation of lithium ions, and the advantages of abundant resources and high theoretical capacity, it has been widely used. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/483H01M10/0525H01M2004/028H01M2220/20H01M4/48Y02E60/10
Inventor 麦立强张鹏飞赵露滋
Owner WUHAN UNIV OF TECH
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