Supercharge Your Innovation With Domain-Expert AI Agents!

Flexible self-supporting vanadium-based heterojunction/graphene composite material as well as preparation method and application thereof

A composite material and heterojunction technology, applied in the field of flexible self-supporting vanadium-based heterojunction/graphene composite material and its preparation, can solve the problems of cumbersome process, long cycle, unsuitable for large-scale production, etc. Effect of nucleation and transformation, short preparation cycle, and excellent catalytic transformation performance

Pending Publication Date: 2020-12-25
WUHAN UNIV OF SCI & TECH
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is cumbersome and has a long cycle, which is not suitable for large-scale production.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flexible self-supporting vanadium-based heterojunction/graphene composite material as well as preparation method and application thereof
  • Flexible self-supporting vanadium-based heterojunction/graphene composite material as well as preparation method and application thereof
  • Flexible self-supporting vanadium-based heterojunction/graphene composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]A flexible self-supporting vanadium-based heterojunction / graphene composite material, the preparation method of which comprises the steps of:

[0038] 1) Dissolve 0.56g of vanadium pentoxide and 5mL of 30wt% hydrogen peroxide solution in 30mL of deionized water, sonicate until the solution turns brownish red; pour the resulting brownish red solution into a 40mL reaction kettle and heat it at 190°C React for 20h; get vanadium pentoxide gel;

[0039] 2) Mix the obtained vanadium pentoxide gel with 40 mL of graphene oxide solution with a concentration of 8 mg / mL, stir and sonicate; then freeze with liquid nitrogen, and then freeze-dry to obtain a precursor material;

[0040] 3) Cut and press the obtained precursor material into thin slices with a diameter of 10 mm, heat-preserve at 550°C and ammonia atmosphere for 20 minutes, then replace with argon, and heat-preserve for 100 minutes under an argon atmosphere; after cooling to room temperature, a three-dimensional porous S...

Embodiment 2

[0049] A flexible self-supporting vanadium-based heterojunction / graphene composite material, the preparation method of which comprises the steps of:

[0050] 1) Dissolve 0.23g of vanadium pentoxide and 5mL of 30wt% hydrogen peroxide solution in 30mL of deionized water, sonicate until the solution turns brown-red; pour the resulting brown-red solution into a 40mL reactor and heat it at 190°C React for 20h; get vanadium pentoxide gel;

[0051] 2) Mix the obtained vanadium pentoxide gel with 20 mL of a graphene oxide solution with a concentration of 5 mg / mL, stir and sonicate; then freeze with liquid nitrogen, and then freeze-dry to obtain a precursor material;

[0052] 3) Cut and press the obtained precursor material into thin slices with a diameter of 10 mm, heat-preserve at 550°C and ammonia atmosphere for 20 minutes, then replace with argon, and heat-preserve for 100 minutes under an argon atmosphere; after cooling to room temperature, a three-dimensional porous Flexible sel...

Embodiment 3

[0055] A flexible self-supporting vanadium-based heterojunction / graphene composite material, the preparation method of which comprises the steps of:

[0056] 1) Dissolve 0.23g of vanadium pentoxide and 5mL of 30wt% hydrogen peroxide solution in 30mL of deionized water, sonicate until the solution turns brown-red; pour the resulting brown-red solution into a 40mL reactor and heat it at 190°C React for 20h; get vanadium pentoxide gel;

[0057] 2) Mix the obtained vanadium pentoxide gel with 20 mL of a graphene oxide solution with a concentration of 5 mg / mL, stir and sonicate; then freeze with liquid nitrogen, and then freeze-dry to obtain a precursor material;

[0058] 3) Cut and press the obtained precursor material into thin slices with a diameter of 10 mm, heat-preserve at 550°C and ammonia atmosphere for 30 minutes, then replace with argon, and heat-preserve for 100 minutes under an argon atmosphere; after cooling to room temperature, a three-dimensional porous Flexible sel...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a flexible self-supporting vanadium-based heterojunction / graphene composite material. Vanadium pentoxide and hydrogen peroxide are taken as main raw materials. Firstly, a graphene / vanadium oxide precursor is prepared by adopting a hydrothermal method and a freeze-drying process, and secondly, a controlled nitriding treatment process is adopted to obtain a graphene loaded vanadium oxide / vanadium nitride heterojunction flexible self-supporting material with a three-dimensional porous structure. By effectively combining the strong adsorbability of vanadium oxide and the high conductivity and catalytic property of vanadium nitride and cooperatively regulating and controlling the adsorption and conversion process of polysulfide, the shuttle effect of a lithium-sulfur battery in the charging and discharging process can be effectively improved; meanwhile, graphene with a three-dimensional porous structure is used as a self-supporting substrate, so that the overall energy density of the material is effectively improved, and the conductivity and stability of the obtained composite material are greatly improved; and the related preparation method is simple, convenientto operate, short in synthesis period and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and specifically relates to a flexible self-supporting vanadium-based heterojunction / graphene composite material and a preparation method and application thereof. Background technique [0002] With the rapid development of society, people's demand for new energy storage technologies with high energy density is increasing. Lithium-sulfur batteries are considered as a next-generation high-specific energy storage technology with important application potential due to their significant advantages such as high specific capacity, low cost, and environmental friendliness, and have attracted widespread attention from all over the world. In the past ten years, although the basic research of lithium-sulfur battery has made great progress, its practical application is still severely restricted by some key issues, such as: 1) sulfur and the reduction product Li 2 The low conductivity of S great...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M4/36H01M4/48H01M4/58H01M4/583H01M10/052H01M10/04B82Y30/00
CPCH01M4/366H01M4/483H01M4/58H01M4/583H01M10/052H01M10/0427B82Y30/00H01M2004/028H01M2004/021Y02E60/10Y02P70/50
Inventor 郑洋杨亚东霍开富张旭明高标付继江
Owner WUHAN UNIV OF SCI & TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com