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VOx (at) C three-dimensional interconnection structure material with adjustable oxidation state as well as preparation method and application of VOx (at) C three-dimensional interconnection structure material

A technology of three-dimensional interconnection and structural materials, applied in the preparation/purification of carbon, vanadium oxide, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of poor stability and low conductivity, and achieve low cost and high specific capacitance , Easy to operate and controllable effect

Pending Publication Date: 2022-04-29
SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, V 2 o 5 Its own low conductivity, poor stability and other shortcomings make its practical application still face a big challenge

Method used

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  • VOx (at) C three-dimensional interconnection structure material with adjustable oxidation state as well as preparation method and application of VOx (at) C three-dimensional interconnection structure material
  • VOx (at) C three-dimensional interconnection structure material with adjustable oxidation state as well as preparation method and application of VOx (at) C three-dimensional interconnection structure material
  • VOx (at) C three-dimensional interconnection structure material with adjustable oxidation state as well as preparation method and application of VOx (at) C three-dimensional interconnection structure material

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preparation example Construction

[0043] The invention provides a VO with adjustable oxidation state x @C Preparation method of three-dimensional interconnected structure material composed of irregular nanoparticles. The prepared method includes the assistance of biomass chitosan, combined with solvothermal and high temperature annealing methods, successfully prepared a VO x A three-dimensional interconnected structure material composed of @C irregular nanoparticles, and as a supercapacitor positive and negative electrode material, has a high specific capacitance.

[0044] In the above technical scheme, in order to prove that V 2 o 5 @C-3 has excellent specific capacitance performance when used as a positive electrode material for supercapacitors. Preferably, the synthesized V 2 o5 -1 material is used as positive electrode material in supercapacitor for comparison.

[0045] In the above technical scheme, in order to prove that V 2 o 5 @C-3 has excellent specific capacitance performance when used as a po...

Embodiment 1

[0051] 1. Preparation of VO x Precursor:

[0052] (1) Configuration solution: 200mg ammonium metavanadate (NH 4 VO 3 ) was dissolved in 2mL of glacial acetic acid and deionized water mixed solution (V 1 :V 2 =1:40), through the oil bath method, the temperature is 60°C, and the time is 3h, to obtain a homogeneous solution.

[0053] (2) Transfer the above solution to a Teflon-coated reaction kettle, put it into an oven for reaction, the reaction temperature is 180° C., and the reaction time is 12 hours.

[0054] (3) Post-reaction treatment: After washing and centrifuging the precipitate obtained in step (2), put it in a vacuum drying oven at 50-70°C and dry it to constant weight to obtain VO x Precursor.

[0055] 2. High temperature annealing forms large flake V 2 o 5 :

[0056] (1) High temperature annealing: the obtained VO x The precursor product was transferred to a tube furnace, fed with nitrogen, and annealed at 400 °C for 2 h to form V 2 o 5 , denoted as V 2 ...

Embodiment 2

[0062] 1. Preparation of VO x @C Precursor:

[0063] (1) Configuration solution: a certain quality of chitosan (50mg) was dissolved in 2mL of glacial acetic acid and deionized water mixed solution (V 1 :V 2 =0.5:20), stirred evenly, recorded as A solution. Then 200mg ammonium metavanadate (NH 4 VO 3 ) was dissolved in 20mL deionized water, stirred evenly, and recorded as solution B. Then transfer solution A to solution B, and heat it in an oil bath at 60°C for 3 hours to obtain a homogeneous solution.

[0064] (2) Reaction preparation: transfer the above solution into a Teflon-coated reaction kettle, put it into an oven for reaction, the reaction temperature is 180° C., and the reaction time is 12 hours.

[0065] (3) Post-reaction treatment: After washing and centrifuging the black precipitate obtained in step (2), put it in a vacuum drying oven at 50-70°C and dry it to constant weight to obtain VO x @C Precursor.

[0066] 2. High temperature annealing to form V 2 o ...

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Abstract

The invention relates to a VOx-C three-dimensional interconnection structure material with an adjustable oxidation state and a preparation method and application thereof, and the method comprises the following steps: preparing a solution: dissolving chitosan in a mixed solvent, uniformly stirring, and recording as a solution A; dissolving ammonium metavanadate in deionized water, uniformly stirring, and recording as a solution B; mixing the solution A and the solution B, heating and stirring to obtain a uniform solution; reaction preparation: transferring the uniform solution into a reaction kettle for hydrothermal reaction to obtain black precipitate; reaction post-treatment: washing and centrifuging the black precipitate, and drying to constant weight to obtain a VOx (at) C precursor; and high-temperature annealing: carrying out annealing treatment on the VOx (at) C precursor in an inert atmosphere to obtain a VOx (at) C three-dimensional interconnection structure material with an adjustable oxidation state, and applying the material to an electrode material of a supercapacitor. Compared with the prior art, the invention has the advantages of higher specific capacitance, simplicity and controllability in operation, lower cost, no pollution and the like.

Description

technical field [0001] The invention relates to the field of supercapacitor materials, in particular to a VO with an adjustable oxidation state x @C Three-dimensional interconnect structure materials and their preparation methods and applications. Background technique [0002] In recent years, with the continuous consumption of fossil fuels and the urgent need for green and sustainable energy, the development of efficient and durable energy storage and conversion devices is imminent. Supercapacitors (SCs) have become one of the most promising energy storage and conversion devices due to their excellent charge-discharge performance, high power density, and long lifetime, compared with various other energy storage devices (Li + battery, Na + Batteries, Li-S batteries) have received extensive attention from researchers all over the world. [0003] According to the charge storage mechanism, supercapacitors are composed of two different types: electric double layer capacitors ...

Claims

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Application Information

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IPC IPC(8): C01G31/02C01B32/05H01G11/30H01G11/86
CPCC01G31/02C01B32/05H01G11/30H01G11/86C01P2004/80C01P2004/03C01P2002/72C01P2006/40Y02E60/13
Inventor 张莉夏京京郭可愚梁莹
Owner SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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