Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Vanadium carbide modified hard carbon material as well as preparation method and application thereof

A vanadium carbide and hard carbon technology, applied in electrochemical generators, active material electrodes, structural parts, etc., can solve the problems of limiting the practical application of sodium-ion batteries, low tap density, low volume energy density, etc. The effect of chemical properties, low cost and simple production process

Active Publication Date: 2021-12-17
CENT SOUTH UNIV
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the specific surface area of ​​the material and increasing the active sites on the surface of the material can effectively improve the Coulombic efficiency, but preparing porous materials to increase the specific surface area of ​​the material will make the material have a lower tap density and a lower volumetric energy density, which limits the sodium Practical Applications of Ion Batteries

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
  • Vanadium carbide modified hard carbon material as well as preparation method and application thereof
  • Vanadium carbide modified hard carbon material as well as preparation method and application thereof
  • Vanadium carbide modified hard carbon material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add vanadium pentoxide and oxalic acid into the aqueous solution at a molar ratio of 1:3, heat and stir at 80°C for 4 hours, and prepare a 0.3mol / L vanadium oxalate solution.

[0041] 1) Add 70mL 0.5mol / L glucose solution and 0.5mL vanadium oxalate solution into a 100mL reaction kettle and stir evenly, then put the reaction kettle into the furnace and heat it at 180°C for 12h, take it out after cooling, and use the obtained product deionized water and ethanol, and dried in an oven.

[0042] 2) Carbonize the above product in a protective atmosphere, raise the temperature to 1000°C at a heating rate of 10°C / min, then raise the temperature to 1300°C at a heating rate of 5°C / min, and keep it for 2 hours to obtain a vanadium carbide modified hard carbon composite energy storage Material.

[0043] 3) The obtained vanadium carbide-modified hard carbon composite energy storage material was prepared as a negative electrode for a sodium-ion battery, and electrochemical tests wer...

Embodiment 2

[0046] Add vanadium pentoxide and oxalic acid into the aqueous solution at a molar ratio of 1:3, heat and stir at 80°C for 4 hours, and prepare a 0.3mol / L vanadium oxalate solution.

[0047] 1) Add 70mL 2mol / L glucose solution and 2mL vanadium oxalate solution into a 100mL reaction kettle and stir evenly, then put the reaction kettle into the furnace and heat it at 160°C for 12h, take it out after cooling, and wash the obtained product with deionized water Wash with ethanol and dry in an oven.

[0048] 2) Carbonize the above product in a protective atmosphere, raise the temperature to 1000°C at a heating rate of 10°C / min, then raise the temperature to 1500°C at a heating rate of 5°C / min, and keep it for 2 hours to obtain a vanadium carbide modified hard carbon composite energy storage Material.

[0049] 3) The obtained vanadium carbide-modified hard carbon composite energy storage material was prepared as a negative electrode for a sodium-ion battery, and electrochemical test...

Embodiment 3

[0051] Add vanadium pentoxide and oxalic acid into the aqueous solution at a molar ratio of 1:3, heat and stir at 80°C for 4 hours, and prepare a 0.3mol / L vanadium oxalate solution.

[0052] 1) Add 70mL 0.125mol / L sucrose solution and 0.5mL vanadium oxalate solution into a 100mL reaction kettle and stir evenly, then put the reaction kettle into the furnace and heat it at 200°C for 12h, take it out after cooling, and use the obtained product deionized water and ethanol, and dried in an oven.

[0053] 2) Carbonize the above product in a protective atmosphere, raise the temperature to 1000°C at a heating rate of 10°C / min, then raise the temperature to 1800°C at a heating rate of 5°C / min, and keep it for 2 hours to obtain a vanadium carbide modified hard carbon composite energy storage Material.

[0054] 3) The obtained vanadium carbide modified hard carbon composite energy storage material is prepared as a negative electrode for a sodium ion battery.

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of batteries, and discloses a vanadium carbide modified hard carbon composite energy storage material as well as a preparation method and an application. The preparation method of the vanadium carbide modified hard carbon composite energy storage material comprises the following steps: (1) adding a carbon source and a vanadium source into an aqueous solution, stirring for a certain time, adding the mixed solution into a reaction kettle for hydrothermal reaction, and centrifuging, washing and drying a product after the reaction is completed; and (3) carbonizing the obtained product in a protective atmosphere to obtain the vanadium carbide modified hard carbon composite energy storage material. The preparation method is simple, and the prepared vanadium carbide modified hard carbon composite energy storage material has relatively high tap density and excellent electrochemical stability, and has a good market application prospect in the aspect of energy storage.

Description

technical field [0001] The invention belongs to the field of energy storage materials and their preparation, and in particular relates to a vanadium carbide modified hard carbon material and its preparation method and application. Background technique [0002] With the continuous development of society, mankind is currently facing two new problems: first, the depletion of fossil fuels such as coal, oil, and natural gas; second, the continuous deterioration of the natural environment. Increasing research on renewable energy and clean energy is the key to solving such problems, and developing high-performance energy storage systems with high energy density, high power density, and long cycle life is the top priority. Efficient energy storage and conversion devices are the key to the utilization of new energy. Electrode materials are the key to determining the performance of energy storage devices. Research on electrode materials with excellent performance is of great significa...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/58H01M4/133H01M10/0525H01M10/054
CPCH01M4/362H01M4/583H01M4/58H01M4/133H01M10/0525H01M10/054H01M2004/027Y02E60/10
Inventor 潘安强陈福平曹鑫鑫
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com