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Calcium vanadate mesoporous nanowire and preparation method and application thereof

A calcium vanadate mesoporous and nanowire technology, which is applied in the field of nanomaterials and electrochemistry, can solve the problems of unreported preparation methods, achieve good cycle stability, improve kinetic properties, and high rate performance

Active Publication Date: 2016-06-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Calcium vanadate mesoporous nanowires, as a new type of negative electrode active material for sodium ion batteries, its preparation method and related research work have not been reported yet

Method used

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  • Calcium vanadate mesoporous nanowire and preparation method and application thereof
  • Calcium vanadate mesoporous nanowire and preparation method and application thereof

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Effect test

Embodiment 1

[0037] The preparation method of calcium vanadate mesoporous nanowire, it comprises the steps:

[0038] 1) Weigh 2mmolV 2 o 5 Added to 30ml of deionized water, stirred with a magnetic stirrer for 20 minutes, and then added 30% H 2 o 2 Solution 5ml, stir again 20 minutes, obtain orange-red clear solution;

[0039] 2) Weigh 90mmol anhydrous CaCl 2 , divided into two parts, and quickly added to the orange-red clear solution in step 1), anhydrous CaCl 2 After all the addition, it will be accompanied by a violent exothermic reaction, and a large amount of orange-red flocculent precipitate will be produced. Continue stirring for 2 hours;

[0040] 3) Transfer the suspension containing flocculent precipitate obtained in step 2) to a 50ml reaction kettle, and heat it at a hydrothermal temperature of 200°C for 4 days; then take it out and naturally cool it to room temperature to obtain an orange-red product;

[0041]4) mash the product obtained in step 3), and transfer all of it ...

Embodiment 2

[0052] The preparation method of calcium vanadate mesoporous nanowire, it comprises the steps:

[0053] 1) Weigh 2mmolV 2 o 5 Added to 30ml of deionized water, stirred with a magnetic stirrer for 20 minutes, and then added 30% H 2 o 2 Solution 5ml, stir again 20 minutes, obtain orange-red clear solution;

[0054] 2) Weigh 90mmol anhydrous CaCl 2 , divided into two parts, and quickly added to the orange-red clear solution in step 1), anhydrous CaCl 2 After all the addition, it will be accompanied by a violent exothermic reaction, and a large amount of orange-red flocculent precipitate will be produced. Continue stirring for 2 hours;

[0055] 3) Transfer the suspension containing flocculent precipitate obtained in step 2) to a 50ml reaction kettle, and heat it at a hydrothermal temperature of 200°C for 2 days; then take it out and naturally cool it to room temperature to obtain an orange-red product;

[0056] 4) mash the product obtained in step 3), and transfer all to 30...

Embodiment 3

[0062] The preparation method of calcium vanadate mesoporous nanowire, it comprises the steps:

[0063] 1) Weigh 4mmolNH 4 VO 3 Add it to 30ml of deionized water, stir with a magnetic stirrer in a water bath at 60°C for 20 minutes, and then add 30% H 2 o 2 Solution 5ml, stir again 20 minutes, obtain orange-yellow clear solution;

[0064] 2) Weigh 100mmol anhydrous CaCl 2 , divided into two parts, and quickly added to the orange-yellow clear solution in step 1), anhydrous CaCl 2 After adding all of it, it will be accompanied by a violent exothermic reaction, and continue to stir for 2 hours;

[0065] 3) Transfer the solution obtained in step 2) to a 50ml reactor, and heat it in water at 200°C for 5 days; then take it out and cool it to room temperature naturally to obtain an orange-red product;

[0066] 4) mash the product obtained in step 3), and transfer all of it to 50ml deionized water, and stir for 1 hour to form a uniform suspension;

[0067] 5) The suspension obta...

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Abstract

The invention relates to a calcium vanadate mesoporous nanowire material and a preparation method thereof. The material can be used as a sodium-ion battery anode active material. The calcium vanadate mesoporous nanowire is obtained in combination with post heat treatment by using a hydrothermal process, the molecular formula of calcium vanadate is CaV4O9, the diameter of the nanowire is 100-200 nm, the length of the nanowire is 5-10 microns, a large number of mesopores are uniformly formed in the surface of the nanowire, and the pore diameters of the mesopores are 20-50 nm. The calcium vanadate mesoporous nanowire material has the beneficial effects that the calcium vanadate mesoporous nanowire material has relatively high specific capacity, good cycling stability and extremely excellent rate capacity when being used as the sodium-ion battery anode active material, and is a potential high-performance sodium-ion battery anode material; and moreover, the preparation method is simple in technology, and the calcium vanadate mesoporous nanowire can be obtained through the simple hydrothermal process and subsequent heat treatment, so that the method is green and environmentally-friendly and relatively low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to a calcium vanadate mesoporous nanowire and a preparation method thereof. The mesoporous nanowire can be used as a negative electrode active material of a sodium ion battery. Background technique [0002] As the world's fossil energy is increasingly depleted, and CO 2 Due to the greenhouse effect and environmental pollution caused by the excessive emissions, the development of renewable new energy will become an inevitable trend in the future. The discontinuous and irregular characteristics of renewable new energy have brought certain challenges to its large-scale development and application. In order to overcome this problem, the development of large-scale energy storage system is very important. Large-scale energy storage systems can store discontinuous energy flows such as solar energy and wind energy first, and then achieve continuous o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/05B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H01M4/5825H01M10/05Y02E60/10
Inventor 麦立强徐小明牛朝江
Owner WUHAN UNIV OF TECH
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