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

Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method

A V2O5, cathode material technology, applied in battery electrodes, structural parts, electrical components, etc., can solve problems such as large toxic gases, improve kinetic characteristics, achieve large-scale production, and facilitate operation.

Inactive Publication Date: 2011-10-05
BEIJING UNIV OF CHEM TECH
View PDF2 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method produces a large amount of toxic gases such as NO 2 , N 2 o 4 Wait

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
  • Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method
  • Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method
  • Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First, dissolve 0.364 g of V2O5 powder (99.8%) in 20 mL of deionized water, then add 4.0 mL of 30% H 2 o 2 And keep stirring at room temperature for 2 hours; meanwhile, dissolve 0.0182g (5wt%ofV2O5) commercial graphite (KS-6) in 10mL deionized water, then add 3.0mL30%H to the above solution under mechanical stirring 2 o 2 and sonicated at 100W for 6h; then, the above two solutions were mixed into a 50mL autoclave, and kept at 205°C for 5 days; finally, the product was washed with deionized water, centrifuged for 30 minutes, and dried in a vacuum oven at 80°C for 12 hour, and then annealed at 400° C. for 30 minutes in an air atmosphere to obtain an ultralong single crystal V2O5 nanowire / graphene composite positive electrode material. SEM and TEM analysis ( figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 ) shows that V with a length of about tens of microns 2 o 5 The nanowires are orderly distributed on the surface and interlayer of transparent graphene n...

Embodiment 2

[0035] First, 0.182g of V2O5 powder (99.8%) was dissolved in 10mL of deionized water, then 5.0mL of isopropanol was added to the above solution under mechanical stirring and the stirring was continued at room temperature for 4 hours; at the same time, 0.0091g ​​(5wt% ofV2O5) Commercial graphite (super-p) was dissolved in 5 mL of deionized water, then 1.5 mL of isopropanol was added to the above solution under mechanical stirring and ultrasonically degraded at 100 W for 4 h; then, the above two solutions were mixed into a 50 mL autoclave, Keep at 210°C for 4 days; finally, the product is washed with deionized water, centrifuged for 30 minutes, dried in a vacuum oven at 80°C for 12 hours, and annealed at 400°C for 30 minutes in an air atmosphere to obtain VO 2 Nanorod / graphene composite cathode material. X-ray diffraction analysis showed that the final product contained GNS and VO respectively 2 Diffraction peak, and VO 2 GNSs in nanorod / graphene composites maintain their orig...

Embodiment 3

[0037] Will 0.364g V 6 o 13 The powder was dissolved in 20 mL of deionized water, and then 4.0 mL of 30% H was added to the above solution under mechanical stirring 2 o 2 And keep stirring at room temperature for 2 hours; at the same time, dissolve 0.0364g (10wt%ofV6O13) commercial expandable graphite in 10mL deionized water, then add 3.0mL 30%H to the above solution under mechanical stirring 2 o 2and sonicated at 100W for 12; then, the above two solutions were mixed into a 50mL autoclave, and roasted at 215°C for 8 days; finally, the product was washed with deionized water, centrifuged for 30 minutes, and dried in a vacuum oven at 80°C for 12 Hours, annealing at 400° C. for 30 minutes in an air atmosphere to obtain a nanostructured vanadium oxide / graphene composite positive electrode material. X-ray diffraction analysis shows that the final product contains GNS and vanadium oxide diffraction peaks respectively, and the electrochemical test results show that the nanostruct...

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

No PUM Login to View More

Abstract

The invention discloses an ultra-long single crystal V2O5 nano wire / graphene anode material and a preparation method, and belongs to the field of lithium ion battery electrode materials and preparation thereof. The V2O5 nano wire / graphene anode material consists of a two-dimensional graphene nano sheet and one-dimensional V2O5 nano wires, wherein the ultra-long single crystal V2O5 nano wires are regularly distributed on the surface and the interlayer of the transparent graphene nano sheet to form a sandwich structure. The preparation method comprises the following steps of: dispersing vanadium oxide powder and merchant graphite into deionized water, adding an oxidant, fully stirring mixture uniformly, performing ultrasonic treatment, putting the mixture into an autoclave, keeping the mixture for certain time at a certain temperature, and performing vacuum drying to obtain the ultra-long single crystal V2O5 nano wire / graphene composite anode material. The invention has the advantages that: the first discharge capacity, the magnification performance and the electrochemical cyclical stability of the composite anode material are remarkably improved. The method is simple, environment-friendly, convenient for operation and easy to realize large-scale production.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode materials and their preparation, and in particular provides an ultra-long single crystal V 2 o 5 The preparation method of nanowire / graphene composite cathode material, and this ultralong single crystal V 2 o 5 The nanowire / graphene composite cathode material exhibits good electrochemical performance. Background technique [0002] Lithium-ion battery is a new type of battery developed after the 1970s, which was first commercialized by Sony in 1990. Due to the advantages of high operating voltage, high energy density, long cycle life, no memory effect and environmental friendliness, lithium-ion batteries have shown irreplaceable advantages in practical applications and are widely used in mobile phones, notebook computers, electric vehicles, etc. , weapons and equipment, etc. [0003] In recent years, the output of lithium-ion batteries has grown rapidly, and its applicati...

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): H01M4/36H01M4/139
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 刘海梅梁丽颖杨文胜
Owner BEIJING UNIV OF CHEM TECH
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