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Large-scale preparation and lithium battery application of vanadium pentoxide and carbon nano composite thereof

A technology of vanadium pentoxide and composite carbon, which is applied in the direction of secondary batteries, nanotechnology, battery electrodes, etc., can solve the problems of high energy consumption, high cost, complex production process, etc., and achieve low energy consumption, short time consumption, and source wide range of effects

Inactive Publication Date: 2017-05-10
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for synthesizing a functional nano-lithium battery positive electrode material with low raw material price, simple process, environmental protection and excellent performance, so as to overcome the disadvantages of current battery materials such as complex production process, high energy consumption and high cost

Method used

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  • Large-scale preparation and lithium battery application of vanadium pentoxide and carbon nano composite thereof
  • Large-scale preparation and lithium battery application of vanadium pentoxide and carbon nano composite thereof
  • Large-scale preparation and lithium battery application of vanadium pentoxide and carbon nano composite thereof

Examples

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Effect test

Embodiment 1

[0034] Dissolve 0.364g of vanadium pentoxide solid powder in 25ml of pure water, add 5ml of hydrogen peroxide solution with a mass fraction of 30%, and place it at room temperature for 1 hour to obtain a dark red solution. The solution was placed in a thermostat at 50° C. for 24 hours, and the solution became a sol. The sol was frozen in liquid nitrogen for 10 min, and then immediately put into a lyophilizer for vacuum drying, and a fluffy solid was obtained after 48 h. Take part of the solid and calcinate it under a nitrogen atmosphere, raise the temperature to 400°C for 0.5h, and the heating rate is 10°C / min to obtain vanadium pentoxide nanomaterials. figure 1Shown is the XRD spectrum of vanadium pentoxide after calcination in Example 1, which is consistent with the standard card JCPDS card no: 41-1426, and belongs to the orthorhombic crystal system and the space group Pmmn.

Embodiment 2

[0036] Dissolve 1.092g of vanadium pentoxide solid powder in 25ml of pure water, add 5ml of hydrogen peroxide solution with a mass fraction of 30%, and place it at room temperature for 1 hour to obtain a dark red solution. The solution was placed in a thermostat at 50° C. for 24 hours, and the solution became a sol. The sol was frozen in liquid nitrogen for 10 min, and then immediately put into a lyophilizer for vacuum drying, and a fluffy solid was obtained after 48 h. Take part of the solid and calcinate it under a nitrogen atmosphere, raise the temperature to 400°C for 0.5h, and the heating rate is 10°C / min to obtain vanadium pentoxide nanomaterials.

Embodiment 3

[0038] Dissolve 1.82g of vanadium pentoxide solid powder in 25ml of pure water, add 5ml of hydrogen peroxide solution with a mass fraction of 30%, and leave it at room temperature for 1 hour to obtain a dark red solution. The solution was placed in a thermostat at 50° C. for 24 hours, and the solution became a sol. The sol was frozen in liquid nitrogen for 10 min, and then immediately put into a lyophilizer for vacuum drying, and a fluffy solid was obtained after 48 h. Take part of the solid and calcinate it under a nitrogen atmosphere, raise the temperature to 400°C for 0.5h, and the heating rate is 10°C / min to obtain vanadium pentoxide nanomaterials.

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Abstract

The invention discloses large-scale preparation and lithium battery application of vanadium pentoxide and carbon nano composite thereof, and belongs to the technical field of functional nano material preparation. The preparation method comprises the following steps: dissolving vanadium pentoxide solid powder in pure water, mixing with hydrogen peroxide, obtaining a scarlet solution, and preserving the temperature of the solution for a period of time to become a colloidal sol; carrying out freeze drying treatment on the colloidal sol to obtain a three-dimensional self-supporting solid; and taking partial solid to be calcinated under nitrogen atmosphere so as to obtain a vanadium pentoxide nano material. The corresponding solid is added into composite carbon nano tube and graphene as long as the scarlet solution is obtained, and the mixture is dispersed uniformly without changing remaining operation. The lithium battery positive electrode material prepared in the method is long in service life, high in capacity and stable in cycle performance. The whole technological process is simple, the price of raw materials is low, no toxic product is generated, the energy consumption is low, and the material is green and environmentally-friendly, so that the disadvantage that existing lithium battery materials are high in production cost, complex in process and great in byproduct toxicity is overcome, and the material is applicable to industrial large-scale production.

Description

technical field [0001] The invention relates to a large-scale preparation method of vanadium pentoxide and its carbon-based composite nanomaterials, which can be used as positive electrode materials of lithium ion batteries, and belongs to the technical field of preparation of functional nanomaterials. Background technique [0002] With the increasing development of the global economy and the rapid growth of the population, human beings have an increasing demand for energy, so the energy problem has become an urgent problem for all human beings to face and solve. The non-renewable and increasingly depleted fossil energy forces us to develop new energy sources. Lithium battery has the characteristics of long cycle life, high energy density, stable performance, and environmental friendliness, and has attracted widespread attention and use. It is the most mature and widely used energy conversion technology in the field of new energy. [0003] Lithium batteries are now widely u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M10/0525H01M10/058B82Y40/00
CPCH01M4/362H01M4/483H01M4/583H01M10/0525H01M10/058B82Y40/00Y02E60/10Y02P70/50
Inventor 朱纪欣黄维马中原黄晓
Owner NANJING UNIV OF TECH
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