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Vanadium pentoxide with three-dimensional communicated nano network structure and preparation method and application of vanadium pentoxide

A technology of vanadium pentoxide and vanadium pentoxide sol, which is applied in the fields of nanomaterials and electrochemistry, can solve the problems of poor rate performance and cycle performance, slow electrochemical kinetics, poor structural stability, etc., and achieve high rate performance, the effect of alleviating structural degradation, and good rate performance

Active Publication Date: 2014-12-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the slow electrochemical kinetics and poor structural stability of Li-ion batteries lead to their poor rate capability and cycle performance, which limits their practical wide application.

Method used

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  • Vanadium pentoxide with three-dimensional communicated nano network structure and preparation method and application of vanadium pentoxide
  • Vanadium pentoxide with three-dimensional communicated nano network structure and preparation method and application of vanadium pentoxide
  • Vanadium pentoxide with three-dimensional communicated nano network structure and preparation method and application of vanadium pentoxide

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Experimental program
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Effect test

Embodiment 1

[0032] The preparation method of vanadium pentoxide with a three-dimensional interconnected nano network structure includes the following steps:

[0033] 1) Measure 1.0mmol of vanadium pentoxide sol and dilute it in deionized water to obtain 10mL solution,

[0034] 2) Add 30mL of 0.2mol / L NH to the solution formed in step 1) 4 H 2 PO 4 Solution directly forms V 2 O 5 Hydrogels.

[0035] 3) The V obtained in step 2) 2 O 5 The hydrogel is aged for 2h at room temperature.

[0036] 4) Wash the gel obtained in step 3) 5 times with water and alcohol, and dry the obtained product in an oven.

[0037] 5) The dried product obtained in step 4) is heated to 350° C. in a muffle furnace, kept for 2 hours, and naturally cooled to room temperature to be taken out to obtain vanadium pentoxide with a three-dimensional interconnected nano network structure.

[0038] Such as figure 1 As shown, the synthesis mechanism of the present invention is: based on the sol-gel technology, the synthesis reaction mainl...

Embodiment 2

[0043] The preparation method of vanadium pentoxide with three-dimensional interconnected nano network structure includes the following steps:

[0044] 1) Measure 1 mmol of vanadium pentoxide sol and dilute it in deionized water to obtain a solution.

[0045] 2) Add 30 mL of (NH) with a concentration of 0.1 mol / L to the solution formed in step 1) 4 ) 2 SO 4 Solution directly forms V 2 O 5 Hydrogels.

[0046] 3) The V obtained in step 2) 2 O 5 The hydrogel was aged for 1 hour at room temperature.

[0047] 4) Wash the gel obtained in step 3) with water and alcohol 5 times, and dry the obtained product in an oven.

[0048] 5) The dried product obtained in step 4) is heated to 300° C. in a muffle furnace, kept for 3 hours, and naturally cooled to room temperature to take out, to obtain vanadium pentoxide with a three-dimensional interconnected nano network structure.

[0049] Take the product of this example as an example, such as Figure 7 As shown, Figure 7 a is to add 30mL 0.1mol / L (NH...

Embodiment 3

[0051] The preparation method of vanadium pentoxide with three-dimensional interconnected nano network structure includes the following steps:

[0052] 1) Measure 2 mmol of vanadium pentoxide sol and dilute it in deionized water to obtain a solution.

[0053] 2) Add 30 mL of 0.2 mol / L NH to the solution formed in step 1) 4 Cl solution directly forms V 2 O 5 Hydrogels.

[0054] 3) The V obtained in step 2) 2 O 5 Aged for 5h at room temperature.

[0055] 4) Wash the gel obtained in step 3) with water and alcohol 5 times, and dry the obtained product in an oven.

[0056] 5) The dried product obtained in step 4) is heated to 350° C. in a muffle furnace, kept for 3 hours, and is naturally cooled to room temperature to be taken out to obtain vanadium pentoxide with a three-dimensional interconnected nano network structure.

[0057] Take the product of this example as an example, such as Figure 7 As shown, Figure 7 b is to add 30mL 0.2mol / L NH to the solution containing 2mmol vanadium pento...

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Abstract

The invention relates to vanadium pentoxide with a three-dimensional communicated nano network structure and a preparation method of vanadium pentoxide. The material can be used as an anode active material of a high-power long-life lithium ion battery, the three-dimensional communicated nano network structure is composed of nano rods which are communicated with one another in a staggered manner, wherein the nano rods are 10-50nm in diameter and 20-200nm in length; and the specific volume of the mesopore formed by the three-dimensional communicated nano network structure is 0.1-1.0cm<3>g<-1>. The vanadium pentoxide has the beneficial effects that the vanadium pentoxide with the three-dimensional communicated nano network structure is excellent in circulation stability and high rate capability; when used as a lithium ion battery anode material, vanadium pentoxide has remarkably improved high rate capability and long service life, and is a potential lithium ion battery anode material with high rate capability and long service life. The vanadium pentoxide is simple and economical in process, is abundant in resource, can be put into mass production easily and is very favorable for marketization application.

Description

Technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and specifically relates to a vanadium pentoxide with a three-dimensional interconnected nano network structure and a preparation method thereof. The material can be used as a positive electrode active material of a high-power long-life lithium ion battery. Background technique [0002] The continuous development of high-performance energy storage equipment is critical to its application in portable electronic equipment, electric vehicles, and large-scale storage devices for renewable energy. Lithium-ion batteries are regarded as the best choice to meet the requirements of practical applications due to their high specific energy and long cycle life. High specific capacity can be achieved by using materials that have a higher specific capacity than the click materials currently used in commercial applications. Among these cathode materials, vanadium pentoxide is due to its l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02H01M4/48B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 麦立强赵露滋冯威安琴友魏湫龙
Owner WUHAN UNIV OF TECH
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