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

Positive electrode material ammonium vanadate/graphene for lithium-ion battery and preparation method of positive electrode material ammonium vanadate/graphene

A technology for lithium ion batteries and positive electrode materials, which is applied in the field of lithium ion battery positive electrode materials ammonium vanadate/graphene and its preparation, can solve problems such as rate performance to be further improved, low electrical conductivity, etc., to improve electrochemical performance, promote In and out, easy to achieve effects

Inactive Publication Date: 2016-11-16
SHAANXI UNIV OF SCI & TECH
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since NH 4 V 3 o 8 Low conductivity, as a battery cathode material, its rate performance needs to be further improved

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
  • Positive electrode material ammonium vanadate/graphene for lithium-ion battery and preparation method of positive electrode material ammonium vanadate/graphene
  • Positive electrode material ammonium vanadate/graphene for lithium-ion battery and preparation method of positive electrode material ammonium vanadate/graphene
  • Positive electrode material ammonium vanadate/graphene for lithium-ion battery and preparation method of positive electrode material ammonium vanadate/graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Analytical pure ammonium metavanadate (NH 4 VO 3 ) was dissolved in an appropriate amount of deionized water at 40°C, and magnetically stirred for 0.5h to fully dissolve ammonium metavanadate and prepare NH 4 + The concentration is 0.1mol / L of NH 4 VO 3 Solution, denoted as A solution;

[0029] 2) Add 12 mg of graphene oxide prepared by the Hummers method into 60 mL of deionized water at room temperature, then stir in a water bath at 25 °C at 1000 r / min for 10 min, then ultrasonicate at 400 W for 120 min, and magnetically stir for 10 min every 0.5 h to obtain B solution;

[0030] 3) Take 30 mL each of solution A and solution B, mix and stir for 20 minutes, and adjust the pH value to 3.0 with 2 mol / L hydrochloric acid solution to obtain solution C;

[0031] 4) Add the C solution into the high temperature-resistant airtight 304 stainless steel reactor liner, the material of the liner is polytetrafluoroethylene, and the volume filling ratio is 60%, then tighten th...

Embodiment 2

[0034] 1) Analytical pure ammonium metavanadate (NH 4 VO 3 ) was dissolved in an appropriate amount of deionized water at 45°C, and magnetically stirred for 0.5h to fully dissolve the ammonium metavanadate and prepare NH 4 + The concentration of 0.05mol / L NH 4 VO 3 Solution, denoted as A solution;

[0035] 2) 20 mg of graphene oxide prepared by the Hummers method was added to 60 mL of deionized water at room temperature, then stirred in a 40°C water bath at 1000 r / min for 10 min, then ultrasonicated at 200 W for 80 min, and magnetically stirred for 10 min every 0.5 h to obtain B solution;

[0036] 3) Take 30 mL each of solution A and solution B, mix and stir for 20 minutes, adjust the pH value to 2.0 with 1 mol / L hydrochloric acid solution, and obtain solution C;

[0037] 4) Add the C solution into the high temperature-resistant airtight 304 stainless steel reactor liner. The material of the liner is polytetrafluoroethylene, and the filling ratio is 60%. The heating rat...

Embodiment 3

[0043] 1) Analytical pure ammonium metavanadate (NH 4 VO 3 ) was dissolved in an appropriate amount of deionized water at 50°C, and magnetically stirred for 0.5h to fully dissolve the ammonium metavanadate and prepare NH 4 + The concentration is 0.08mol / L of NH 4 VO 3 Solution, denoted as A solution;

[0044] 2) 30 mg of graphene oxide prepared by the Hummers method was added to 60 mL of deionized water at room temperature, then stirred in a water bath at 30° C. at 1000 r / min for 10 min, ultrasonicated at 300 W for 100 min, and magnetically stirred for 10 min every 0.5 h to obtain B solution;

[0045] 3) Take 30 mL each of solution A and solution B, mix and stir for 20 minutes, adjust the pH value to 4.0 with 0.5 mol / L hydrochloric acid solution, and record it as solution C;

[0046] 4) Add the C solution into the high temperature-resistant airtight stainless steel reactor liner with a filling ratio of 60%, then tighten the stainless steel reactor and place it in a progr...

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 provides a positive electrode material ammonium vanadate / graphene for a lithium-ion battery and a preparation method of the positive electrode material ammonium vanadate / graphene. The method comprises the steps of dissolving ammonium metavanadate into deionized water to obtain an NH4VO3 solution and denoting the NH4VO3 solution as an A solution; dissolving graphene oxide into the deionized water to obtain 0.2-1.0g / L of graphene oxide solution and denoting the graphene oxide solution as a B solution; mixing the A solution with the B solution to obtain a C solution; and carrying out heat preservation on the C solution at 120-170 DEG C for 120-180 minutes to obtain the positive electrode material ammonium vanadate / graphene composite material for the lithium-ion battery. A microstructure of the material is that rodlike NH4V3O8 uniformly grows on a graphene sheet layer in situ; the lamellar shape and form provide Li<+> de-intercalation with more active sites; an active substance can be in more full contact with an electrolyte; Li<+> intercalation and de-intercalation are promoted; and the defect of poor conductivity of the NH4V3O8 is overcome, so that the electrochemical properties of the material are improved; and the technology is simple and easy to implement.

Description

technical field [0001] The invention relates to the technical field of preparation of positive electrode materials for lithium ion batteries, in particular to ammonium vanadate / graphene, a positive electrode material for lithium ion batteries, and a preparation method thereof. Background technique [0002] With the development of society, energy issues have become the main problem restricting social development, and the burning of fossil fuels leads to global warming. For the better development of society, human beings have put forward higher requirements for clean energy, and at the same time, it has provided a better opportunity for the development of new energy. Lithium-ion batteries have the advantages of high specific energy, high power density, long cycle life, low self-discharge, and high cost performance. They have been widely used in portable electronic products, electric vehicles, and large power supplies. Cathode materials account for about 35-40% of the cost of ...

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): H01M4/36H01M4/48H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/48H01M4/625H01M10/0525Y02E60/10
Inventor 黄剑锋寇领江曹丽云李嘉胤费杰欧阳海波李翠艳吴建鹏
Owner SHAANXI UNIV OF SCI & 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