CN102485644A - Method for preparing vanadium nitride - Google Patents
Method for preparing vanadium nitride Download PDFInfo
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- CN102485644A CN102485644A CN2010105701921A CN201010570192A CN102485644A CN 102485644 A CN102485644 A CN 102485644A CN 2010105701921 A CN2010105701921 A CN 2010105701921A CN 201010570192 A CN201010570192 A CN 201010570192A CN 102485644 A CN102485644 A CN 102485644A
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- vanadium nitride
- preparation
- vanadium
- nitrogen compound
- organic nitrogen
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Abstract
The invention provides a method for preparing vanadium nitride, which is characterized in that vanadium nitride is mixed with an organic nitrogen compound and is performed heat treatment by a solvent to prepare a vanadium nitride chelate, crystallized and filtered, then calcinied in the protective gas to obtain the vanadium nitride. The vanadium nitride prepared by the invention has the advantages of small particle size, high specific capacitance and good cycle performance. The preparation method of vanadium nitride has the advantages of mild reaction condition and low reaction temperature, and is capable of effectively preventing the agglomeration of vanadium nitride nano particles; the crystallized and filtered superfluous anoxic organic nitrogen compound can be recovered and reused, so that the energy can be saved and the production cost can be reduced.
Description
Technical field
The present invention relates to the preparation field of electrode material for super capacitor, be specifically related to a kind of preparation method of vanadium nitride.
Background technology
Ultracapacitor has wide application prospect as a kind of novel energy-storing device on portable power consumption electronic product and electromobile.At present, commercial ultracapacitor is generally non-aqueous electrolyte, is electrode materials with the carbon material.There is certain potential safety hazard in this type of ultracapacitor when using, and the ratio electric capacity of carbon material is relatively low.RuO
2﹒ nH
2O has excellent conducting performance, has very high ratio electric capacity simultaneously, is a kind of super capacitor material of excellent property, but owing to its scarcity of resources, costing an arm and a leg is difficult to business promotion.
Vanadium nitride (VN) has very high heat, chemicalstability and stronger mechanical property, is used for the creep rupture strength that cutting tool and structured material can improve steel, improves the toughness and the plasticity of steel, can also improve the heat resistanceheat resistant intensity and anti-creep ability in short-term of steel simultaneously; Simultaneously, vanadium nitride has high catalytic activity, highly selective, satisfactory stability property and anti-poisoning performance as catalyzer, and the similar Pt of its catalysis behavior, Pd and Rh are the stand-ins of these rare precious metals.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of preparation method of vanadium nitride is provided.
Above-mentioned purpose of the present invention is achieved through following technical scheme:
A kind of preparation method of vanadium nitride comprises the steps: that vanadium oxide is mixed the process solvent heat treatment with organic nitrogen compound make vanadium nitrogen inner complex, and crystallization, filtration are calcined in shielding gas then, obtain vanadium nitride.
In the preparation method of above-mentioned vanadium nitride, said shielding gas is one or both the mixture in nitrogen, ammonia, the argon gas.
In the preparation method of above-mentioned vanadium nitride, the mass ratio of said vanadium oxide and organic nitrogen compound is 1:5 ~ 1:20.
In the preparation method of above-mentioned vanadium nitride, said solvent thermal reaction temperature is 80 ~ 180 ℃, and constant temperature 1 ~ 3 hour.
In the preparation method of above-mentioned vanadium nitride, said calcining temperature is 500 ~ 600 ℃, and the reaction times is 1 ~ 3 hour.
Compared with prior art, the present invention has following beneficial effect:
(1) low-temperature sintering is adopted in aftertreatment of the present invention, has avoided the reunion again of nano microcrystalline, can improve the super capacitor characteristic of material;
(2) the recyclable recycling of the used organic nitrogen compound of the present invention accomplishes that as much as possible energy consumption is low, the energy-saving and emission-reduction requirement that materials are few;
(3) the vanadium nitride material specific surface area that makes of preparation method of the present invention is big; The material footpath is little; Have higher ratio electric capacity and excellent cycle performance, after 2000 charge and discharge cycles, significantly decay does not take place in capacity; Charge-discharge performance under big electric current is particularly outstanding especially, can be used as the preferable candidate material of ultracapacitor.
Embodiment
Come further to explain the present invention below in conjunction with embodiment, but embodiment does not do any type of qualification to the present invention.
Embodiment 1
Get the 1.3g vanadium oxide and the 50ml quadrol places reaction kettle, be heated to 150 ℃ of reaction 3h, be cooled to room temperature; Treat the inner complex crystallization and filtration, gained inner complex crystal is loaded charging with the porcelain Noah's ark, in the tube furnace that has nitrogen protection and temperature programming gear, calcine; 5 ℃ of heat-up rates/min to 600 ℃; Be incubated 2 hours, behind the cool to room temperature, promptly get title product.
Above-mentioned title product overwhelming majority particle diameter＜50 nm; Good conductivity is processed working electrode with it as the electrode of super capacitor active material, and assembling simulation ultracapacitor cell is carried out cyclic voltammetric and constant current charge-discharge test; Under 4 A/g high current densities, discharge and recharge; Its specific storage be electric current close when the 1.5A/g 88.4%, sweep speed 2000 circulations of warp down at 35 mV/s, its capacity has only decayed 7.5%.Test result shows that this material has higher specific storage and good electrochemical stability, can become the candidate material of ultracapacitor.
Embodiment 2
Get 1.3g vanadium oxide and 100ml hydrazine in reaction kettle, be heated to 130 ℃ of reaction 2h, be cooled to room temperature; Treat the inner complex crystallization and filtration, gained inner complex crystal is loaded charging with the porcelain Noah's ark, in the tube furnace that has protection of ammonia and temperature programming gear, calcine; 5 ℃ of heat-up rates/min to 500 ℃; Be incubated 2 hours, behind the cool to room temperature, promptly get title product.
Above-mentioned title product overwhelming majority particle diameter＜30 nm; Good conductivity is processed working electrode with it as the electrode of super capacitor active material, and assembling simulation ultracapacitor cell is carried out cyclic voltammetric and constant current charge-discharge test; Under 4 A/g high current densities, discharge and recharge; Its specific storage be electric current close when the 1.5A/g 88.4%, sweep speed 2000 circulations of warp down at 35 mV/s, its capacity has only decayed 3.5%.Test result shows that this material has higher specific storage and good electrochemical stability, can become the candidate material of ultracapacitor.
Claims (5)
1. the preparation method of a vanadium nitride is characterized in that comprising the steps: that vanadium oxide is mixed the process solvent heat treatment with organic nitrogen compound make vanadium nitrogen inner complex, and crystallization, filtration are calcined in shielding gas then, obtain vanadium nitride.
2. the preparation method of vanadium nitride according to claim 1 is characterized in that said shielding gas is one or both the mixture in nitrogen, ammonia, the argon gas.
3. the preparation method of vanadium nitride according to claim 1, the mass ratio that it is characterized in that said vanadium oxide and organic nitrogen compound is 1:5 ~ 1:20.
4. the preparation method of vanadium nitride according to claim 1 is characterized in that said solvent thermal reaction temperature is 80 ~ 180 ℃, and constant temperature 1 ~ 3 hour.
5. the preparation method of vanadium nitride according to claim 1 is characterized in that said calcining temperature is 500 ~ 600 ℃, and the reaction times is 1 ~ 3 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105701921A CN102485644A (en) | 2010-12-02 | 2010-12-02 | Method for preparing vanadium nitride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105701921A CN102485644A (en) | 2010-12-02 | 2010-12-02 | Method for preparing vanadium nitride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102485644A true CN102485644A (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105701921A Pending CN102485644A (en) | 2010-12-02 | 2010-12-02 | Method for preparing vanadium nitride |
Country Status (1)
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| CN (1) | CN102485644A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023236575A1 (en) * | 2022-06-06 | 2023-12-14 | 武汉理工大学 | Carbon matrix composite vanadium nitride nano array, and preparation method therefor and use thereof |
-
2010
- 2010-12-02 CN CN2010105701921A patent/CN102485644A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023236575A1 (en) * | 2022-06-06 | 2023-12-14 | 武汉理工大学 | Carbon matrix composite vanadium nitride nano array, and preparation method therefor and use thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120606 |