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Method for preparing urchin-like vanadium base nanometer electrode material and application of the material

A nano-electrode, sea urchin-like technology, which is applied in the field of preparation of sea urchin-like vanadium-based nano-electrode materials, can solve the problems of soft template removal, etc., and achieve the effects of alleviating structural collapse, good controllability, and improving mechanical strength and crystal structure

Active Publication Date: 2015-05-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to synthesize products with specific morphology, it is necessary to control the anisotropic growth of crystals, so most methods either use vanadyl triisopropoxide (VOT), vanadyl acetylacetonate (VO(acac)2) or acetyl Vanadium acetonate (V(acac)3) is used as a raw material; or surfactants such as polyvinylpyrrolidone (PVP), hexadecylamine (HDA) or CTAB need to be added as soft templates, but there are problems such as soft template removal, or It is synthesized by complex electrodeposition method, and there are some defects

Method used

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  • Method for preparing urchin-like vanadium base nanometer electrode material and application of the material
  • Method for preparing urchin-like vanadium base nanometer electrode material and application of the material
  • Method for preparing urchin-like vanadium base nanometer electrode material and application of the material

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Embodiment 1

[0034] Embodiment 1: one, a kind of preparation method of sea urchin shape vanadium-based nano-electrode material, comprises the steps:

[0035] 1) Add 4mmolV 2 o 5 (purity is 99%) join 32.64mL mass concentration and be 10% H 2 o 2 Solution, in 25 ℃ water bath electromagnetic stirring 2h, obtains transparent bright red vanadium precursor solution (V V ); Wherein, mass concentration is 10% hydrogen peroxide solution and adopts 10.88mL mass concentration to be 30% H 2 o 2 Solution mixed with 21.76mL deionized water;

[0036] 2) Measure 6mL of vanadium precursor solution into a 50mL beaker, then add 17mL of ethylene glycol (EG) and 17mL of deionized water, and finally add 3mmol of (NH 4 ) 2 SO 4 , magnetic stirring for 10min to mix the solution (the pH of the mixed solution is 2.5);

[0037] 3) After the stirring is completed, transfer the solution to a 50mL hydrothermal reaction kettle, seal it and put it in a dry box for a hydrothermal reaction at 180°C for 24 hours, a...

Embodiment 2

[0046] Embodiment 2: one, a kind of preparation method of sea urchin shape vanadium-based nano-electrode material, comprises the steps:

[0047] 1) Add 4mmolV 2 o 5 (purity is 99%) join 32.64mL mass concentration and be 10% H 2 o 2 Solution, in 25 ℃ water bath electromagnetic stirring 2h, obtains transparent bright red vanadium precursor solution (V V ); Wherein, mass concentration is 10% hydrogen peroxide solution and adopts 10.88mL mass concentration to be 30% H 2 o 2 Solution mixed with 21.76mL deionized water;

[0048] 2) Measure 5 mL of vanadium precursor solution into a beaker, then add 15 mL of ethylene glycol (EG) and 20 mL of deionized water, and finally add 3 mmol of (NH 4 ) 2 SO 4 , magnetic stirring for 10min to mix the solution (the pH of the solution is 2.5);

[0049] 3) After the stirring is completed, transfer the solution to a hydrothermal reaction kettle, seal it and put it in a dry box for hydrothermal reaction at 200°C for 24 hours, and air cool to...

Embodiment 3

[0058] Embodiment 3: one, a kind of preparation method of sea urchin shape vanadium-based nano-electrode material, comprises the steps:

[0059] 1) Add 4mmolV 2 o 5 (purity is 99%) join 32.64mL mass concentration and be 20% H 2 o 2 Solution, in 25 ℃ water bath electromagnetic stirring 2h, obtains transparent bright red vanadium precursor solution (V V); Wherein, mass concentration is 20% hydrogen peroxide solution and adopts 21.76mL mass concentration to be 30% H 2 o 2 Solution mixed with 10.88mL deionized water;

[0060] 2) Measure 6mL of vanadium precursor solution into the beaker, then add 17mL of ethylene glycol (EG) and 17mL of deionized water, and finally add 5mmol of (NH 4 ) 2 SO 4 , adjust the pH of the solution to 2.0 with 1M dilute sulfuric acid, and stir the solution for 10 minutes with electromagnetic stirring;

[0061] 3) After the stirring is completed, transfer the solution to a hydrothermal reaction kettle, seal it and put it in a dry box for hydrother...

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Abstract

The invention discloses a method for preparing an urchin-like vanadium base nanometer electrode material and application of the material. The method comprises the steps of adding vanadium pentoxide into aqueous hydrogen peroxide, and performing electromagnetic stirring in water bath to prepare a vanadium precursor solution; taking the vanadium precursor solution, ethylene glycol and deionized water and adding ammonium sulfate, controlling the solution within Ph2.0-3.0, performing electromagnetic stirring to mix the solution, and transferring the solution to a hydrothermal reaction kettle to perform hydrothermal reaction for 5-48h at 160-200 DEG C; centrifuging, washing and drying to prepare the electrode material. The invention further discloses a method for preparing an electrode plate, and the method is characterized in that the urchin-like vanadium base nanometer electrode material is mixed with a binder and a conductive agent according to the weight proportion of (70-80) to (0-10) to 10 and a current collector is coated with the mixture. According to the method, V205 with the relatively low price is regarded as a vanadium source without any surface active agent; the preparation process is simple, efficient, steady and economic, the morphology change of the material is slightly affected by heat treatment, and the prepared urchin-like vanadium base nanometer electrode material has high specific capacity and long cycling life in water electrolyte and organic electrolyte.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for supercapacitors, and in particular relates to a preparation method and application of a sea urchin-shaped vanadium-based nanometer electrode material. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, have the advantages of high power density, fast charge and discharge speed, and long cycle life. They are energy storage devices with great application potential and can be a good supplement to the power density of lithium-ion batteries. However, the "low energy density" characteristic of supercapacitors seriously restricts its practical application. According to the energy density formula E=1 / 2CV of supercapacitors 2 (C is the specific capacity, V is the voltage), it can be seen that improving the specific capacity of the electrode material is an important way to improve its energy density. [0003] According to different energy storage mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/46H01G11/30H01G11/24
CPCY02E60/13H01G11/86B82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/46
Inventor 李鸿乂汪亮魏闯李新禄谢兵王雨
Owner CHONGQING UNIV
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