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Vanadium pentoxide with three-dimensional interconnected nano-network structure and its preparation method and application

A vanadium pentoxide and network structure technology, applied in the field of vanadium pentoxide and its preparation, can solve the problems of poor rate performance and cycle performance, slow electrochemical kinetics, poor structural stability, etc., and achieve high rate performance , Alleviate structural degradation, good rate performance

Active Publication Date: 2016-07-06
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 interconnected nano-network structure and its preparation method and application
  • Vanadium pentoxide with three-dimensional interconnected nano-network structure and its preparation method and application
  • Vanadium pentoxide with three-dimensional interconnected nano-network structure and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0032] A method for preparing vanadium pentoxide with a three-dimensional interconnected nano-network structure, comprising the following steps:

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

[0034] 2) Add 30 mL of NH with a concentration of 0.2 mol / L to the solution formed in step 1) 4 h 2 PO 4 The solution directly forms V 2 o 5 Hydrogels.

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

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

[0037] 5) Heating the dried product obtained in step 4) to 350° C. in a muffle furnace, keeping it warm for 2 hours, cooling it naturally to room temperature and taking it out to obtain vanadium pentoxide with a three-dimensional interconnected nano-network structure.

[0038] like figure 1As shown, the synthesis mechanism of the present inv...

Embodiment 2

[0043] A method for preparing vanadium pentoxide with a three-dimensional interconnected nano-network structure, comprising the following steps:

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

[0045] 2) To the solution formed in step 1), add 30 mL of (NH 4 ) 2 SO 4 The solution directly forms V 2 o 5 Hydrogels.

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

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

[0048] 5) Heating the dried product obtained in step 4) to 300° C. in a muffle furnace, keeping it warm for 3 hours, cooling it naturally to room temperature and taking it out to obtain vanadium pentoxide with a three-dimensional interconnected nano-network structure.

[0049] Taking the product of this example as an example, such as Figure 7 as shown, Figure 7 a is to add 30...

Embodiment 3

[0051] A method for preparing vanadium pentoxide with a three-dimensional interconnected nano-network structure, comprising 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 NH with a concentration of 0.2 mol / L 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 Aging at room temperature for 5h.

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

[0056] 5) Heating the dried product obtained in step 4) to 350° C. in a muffle furnace, keeping it warm for 3 hours, cooling it naturally to room temperature and taking it out to obtain vanadium pentoxide with a three-dimensional interconnected nano-network structure.

[0057] Taking the product of this example as an example, such as Figure 7 as shown, Figure 7 b is to add...

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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 in particular 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 and long-life lithium-ion battery. Background technique [0002] The continued development of high-performance energy storage devices is crucial for their applications in portable electronic devices, electric vehicles, and large-scale storage devices for renewable energy. Lithium-ion batteries are considered to be the best choice for practical applications due to their high specific energy and long cycle life. High specific capacities can be achieved by employing materials with higher specific capacities than click materials in commercial applications today. Among these cathode materials, vanadium pentoxide is due to its low cost, abundant stora...

Claims

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Application Information

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Patent Type & Authority Patents(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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