Vanadium oxide/carbon nanotube flexible film as well as preparation method and application thereof

A technology of vanadium oxide and carbon nanotubes, which is applied in the field of nanomaterials and electrochemistry, can solve the unreported problems of vanadium oxide/carbon nanotube flexible thin film electrodes, and achieve excellent cycle stability, excellent rate performance, and equipment requirements low effect

Inactive Publication Date: 2017-05-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, vanadium oxide / carbon nanotube composites have been gradually studied as cathode materials for lithium-ion batteries, but vanadium oxide / carbon nanotube flexible thin film electrodes have not been reported yet.

Method used

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  • Vanadium oxide/carbon nanotube flexible film as well as preparation method and application thereof
  • Vanadium oxide/carbon nanotube flexible film as well as preparation method and application thereof
  • Vanadium oxide/carbon nanotube flexible film as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing a vanadium oxide / carbon nanotube flexible film, which comprises the following steps:

[0032] 1) Weigh 17mg of polyvinylpyrrolidone (PVP, K30) and 0.1mmol LiCO 3 Dissolve in 30mL deionized water;

[0033] 2) Add 100 mg of multi-walled carbon nanotubes to the solution obtained in step 1), and ultrasonically disperse for 1 hour;

[0034] 3) Add 1.5 mmol vanadium pentoxide sol with a volume of 30 mL to the solution obtained in step 2), continue stirring for 1 hour, and ultrasonically disperse for 1 hour;

[0035] 4) Transfer the solution obtained in step 3) into a 100mL reaction kettle, and react in an oven at 160°C for 96 hours; take out the reaction kettle, and naturally cool to room temperature;

[0036] 5) After fully stirring and breaking up the product obtained in step 4), use a mixed cellulose filter membrane with a pore size of 0.45 μm as a suction filter paper, and take 5 mL of hydrogel for suction filtration;

[0037] 6) Dry the filter m...

Embodiment 2

[0043] A method for preparing a vanadium oxide / carbon nanotube flexible film, which comprises the following steps:

[0044] 1) Weigh 17mg of polyvinylpyrrolidone (PVP, K30) and 0.2mmol LiCO 3 Dissolve in 30mL deionized water;

[0045] 2) Add 150 mg of multi-walled carbon nanotubes to the solution obtained in step 1), and ultrasonically disperse for 1 hour;

[0046] 3) Add 1.5 mmol vanadium pentoxide sol with a volume of 30 mL to the solution obtained in step 2), continue stirring for 1 hour, and ultrasonically disperse for 1 hour;

[0047] 4) Transfer the solution obtained in step 3) into a 100mL reactor, and react in an oven at 200°C for 120 hours; take out the reactor, and cool it down to room temperature naturally;

[0048] 5) After fully stirring and breaking up the product obtained in step 4), use a mixed cellulose filter membrane with a pore size of 0.10 μm as a suction filter paper, and take 5 mL of hydrogel for suction filtration;

[0049] 6) Dry the filter membrane...

Embodiment 3

[0054] A method for preparing a vanadium oxide / carbon nanotube flexible film, which comprises the following steps:

[0055] 1) Weigh 17mg of polyvinylpyrrolidone (PVP, K30) and 0.1mmol LiCO 3 Dissolve in 30mL deionized water;

[0056] 2) Add 150 mg of multi-walled carbon nanotubes to the solution obtained in step 1), and ultrasonically disperse for 1 hour;

[0057] 3) Add 1.5 mmol vanadium pentoxide sol with a volume of 30 mL to the solution obtained in step 2), continue stirring for 1 hour, and ultrasonically disperse for 1 hour;

[0058] 4) Transfer the solution obtained in step 3) into a 100mL reactor, and react in an oven at 180°C for 108 hours; take out the reactor, and cool it down to room temperature naturally;

[0059] 5) After fully stirring and breaking up the product obtained in step 4), use a mixed cellulose filter membrane with a pore size of 0.45 μm as a suction filter paper, and take 10 mL of hydrogel for suction filtration;

[0060] 6) Dry the filter membran...

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Abstract

The invention relates to a high-magnification vanadium oxide / carbon nanotube flexible film as well as a preparation method and application thereof. The vanadium oxide / carbon nanotube flexible film is formed by stacking a vanadium oxide nanoribbon, a vanadium oxide nanoscroll and a carbon nanotube in layers, wherein the thickness of the film is 40-160 microns, and the thickness of the vanadium oxide nanoribbon is 6-10nm; the vanadium oxide nanoscroll is formed by curling the vanadium oxide nanoribbon, the diameter is 0.3-1 micron, and the length is 0.8-2 microns; and the outer diameter of the carbon nanotube is 8-15nm, and the length is 45-50 microns. The invention has the following beneficial effects: a flexible vanadium oxide / carbon nanotube composite is successfully synthesized by a one-step hydrothermal method; and with a simple suction filtration method, a self-support vanadium oxide / carbon nanotube flexible film electrode material with controllable thickness is prepared. When used as a lithium ion battery anode active material, the flexible film electrode shows excellent cyclic stability and high magnification.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and specifically relates to a high-rate vanadium oxide / carbon nano-flexible tube film and its preparation method and application. The material can be used as a high-energy, high-rate, long-life flexible lithium-ion battery Positive active material. Background technique [0002] As a green chemical storage device, lithium-ion batteries have been widely used in portable devices such as mobile phones, digital cameras, and notebook computers, and have gradually become the best choice for power mobile power supplies. Therefore, the study of lithium-ion batteries with large capacity, high power, long life, and low cost is one of the frontiers and hotspots of lithium-ion battery research in the current low-carbon economy era. With the development of modern science and technology, more and more portable electronic products are gradually becoming wearable, foldable, and flexibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/587H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/483H01M4/587H01M10/0525Y02E60/10
Inventor 麦立强魏湫龙潘烨欣谭双双
Owner WUHAN UNIV OF TECH
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