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Multi-dimensional assembled three-dimensional vanadium trioxide/carbon composite nano material as well as preparation method and application thereof

A composite nanomaterial, multi-dimensional technology, applied in the field of three-dimensional V2O3/C composite nanomaterials and its preparation, can solve the problem of unreported composite nanomaterials, achieve excellent cycle stability and high rate characteristics, improve cycle life, The effect of relieving expansion stress

Active Publication Date: 2017-02-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Three-dimensional V assembled in multiple dimensions 2 o 3 / C composite nanomaterials have not yet been reported

Method used

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  • Multi-dimensional assembled three-dimensional vanadium trioxide/carbon composite nano material as well as preparation method and application thereof
  • Multi-dimensional assembled three-dimensional vanadium trioxide/carbon composite nano material as well as preparation method and application thereof
  • Multi-dimensional assembled three-dimensional vanadium trioxide/carbon composite nano material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0033] Three-dimensional V assembled in multiple dimensions 2 o 3 / C composite nanomaterial preparation method, it comprises the steps:

[0034] 1) Weigh 0.8mmol of V 2 o 5 powder and an equal amount of hexadecylamine powder were added to equal volumes of deionized water and absolute ethanol, and stirred evenly;

[0035] 2) Mix and stir the solution obtained in step 1), then transfer the mixed solution into a reaction kettle, react at a temperature of 180° C. for 36 hours, take out the reaction kettle, and naturally cool to room temperature;

[0036] 3) centrifuging the product obtained in step 2), repeatedly washing the obtained precipitate with deionized water and absolute ethanol, and drying in an oven to obtain vanadium oxide nanovolumes;

[0037] 4) Take 200 mg of vanadium oxide nanovolumes obtained in step 3), add them to 5 mL of absolute ethanol, then add reduced graphene oxide with a mass ratio of 8% and 5 mL of deionized water, stir evenly, and then add 10 mg of h...

Embodiment 2

[0045] Three-dimensional V assembled in multiple dimensions 2 o 3 / C composite nanomaterial preparation method, it comprises the steps:

[0046] 1) Weigh 0.8mmol of V 2 o 5 powder and an equal amount of hexadecylamine powder were added to equal volumes of deionized water and absolute ethanol, and stirred evenly;

[0047] 2) Mix and stir the solution obtained in step 1), then transfer the mixed solution into a reaction kettle, react at a temperature of 180° C. for 36 hours, take out the reaction kettle, and naturally cool to room temperature;

[0048] 3) centrifuging the product obtained in step 2), repeatedly washing the obtained precipitate with deionized water and absolute ethanol, and drying in an oven to obtain vanadium oxide nanovolumes;

[0049] 4) Take 150 mg of vanadium oxide nanovolumes obtained in step 3), add them to 5 mL of absolute ethanol, then add reduced graphene oxide with a mass ratio of 8% and 5 mL of deionized water, stir evenly, and then add 10 mg of h...

Embodiment 3

[0054] Three-dimensional V assembled in multiple dimensions 2 o 3 / C composite nanomaterial preparation method, it comprises the steps:

[0055] 1) Weigh 2mmol of V 2 o 5 powder and an equal amount of hexadecylamine powder were added to equal volumes of deionized water and absolute ethanol, and stirred evenly;

[0056] 2) Mix and stir the solution obtained in step 1), then transfer the mixed solution into a reaction kettle, react at a temperature of 200° C. for 72 hours, take out the reaction kettle, and naturally cool to room temperature;

[0057] 3) centrifuging the product obtained in step 2), repeatedly washing the obtained precipitate with deionized water and absolute ethanol, and drying in an oven to obtain vanadium oxide nanovolumes;

[0058] 4) Take 300 mg of the vanadium oxide nanovolumes obtained in step 3), add them to 10 mL of absolute ethanol, then add reduced graphene oxide with a mass ratio of 12% and 10 mL of deionized water, stir evenly, and then add 15 mg...

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Abstract

The invention relates to a multi-dimensional assembled three-dimensional vanadium trioxide / carbon composite nano material as well as a preparation method and application thereof. The structure can be used as a high-power and long-life sodium ion battery cathode active material and is formed by embedding zero-dimensional V2O3 nano particles into a one-dimensional carbon nano tube and further clamping and embedding the carbon nano tube into a reduced graphene oxide network; the particle size of the V2O3 particles is 8 to 20 nm; the diameter of the carbon nano tube is 100 to 150 nm, and the carbon nano tube is 1 to 3 [mu]m in length; reduced graphene oxide is 3 to 5 nm in thickness. The multi-dimension assembled three-dimensional vanadium trioxide / carbon composite nano material has the beneficial effect that based on the synergistic effect of a multidimensional nano structure, the multi-dimension assembled three-dimensional V2O3 / C composite nano material is obtained through a liquid phase method and a calcination method. When used as the sodium ion battery cathode active material, the multi-dimensional assembled three-dimensional V2O3 / C composite nano material is excellent in circulating stability and high-magnification characteristic, and is a potential application material of a high-power and long-life sodium ion battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, in particular to a three-dimensional V 2 o 3 / C composite nanomaterial and its preparation method, the structure can be used as the negative electrode active material of high-power and long-life sodium-ion battery. Background technique [0002] With the gradual increase in energy consumption and the depletion of traditional fossil fuels, the efficient use of new renewable energy has attracted widespread attention. Lithium-ion secondary batteries have been widely used in the storage of renewable energy due to their high capacity, long life, and no memory effect. However, due to the limited and uneven distribution of lithium reserves, its cost continues to rise. Compared with lithium, sodium metal is cheap and abundant, and sodium ions can undergo intercalation and deintercalation reactions similar to lithium ions in electrode materials to achieve charge transfer, so s...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/587
CPCH01M4/364H01M4/48H01M4/587Y02E60/10
Inventor 麦立强谭双双戴宇航魏湫龙
Owner WUHAN UNIV OF TECH
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