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

Convenient method for preparing binder-free stannic oxide/carbon fibrofelt for negative pole of high-performance lithium ion battery

A lithium-ion battery, carbon fiber felt technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limited laboratory conditions, unfavorable large-scale production, cumbersome synthesis steps, etc., to suppress volume changes, improve electrical conductivity and Catalytic ability, effect of improving mechanical stability

Inactive Publication Date: 2015-01-28
HUNAN UNIV
View PDF4 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the solutions have cumbersome process synthesis steps, or use templates, and the cost is too high, which is limited to laboratory conditions and is not conducive to commercial mass 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
  • Convenient method for preparing binder-free stannic oxide/carbon fibrofelt for negative pole of high-performance lithium ion battery
  • Convenient method for preparing binder-free stannic oxide/carbon fibrofelt for negative pole of high-performance lithium ion battery
  • Convenient method for preparing binder-free stannic oxide/carbon fibrofelt for negative pole of high-performance lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First take the GO suspension; then take PAN (polyacrylonitrile), dihydrate tin dichloride dissolved in DMF, the concentration is 6.5% and 2.5% respectively, and mix the graphene oxide suspension as the precursor solution; the precursor solution At 60°C, stir magnetically until the mixture turns into a clear solution, and the color changes from transparent light brown to black (graphene color); the precursor solution is transferred to a 10ml syringe with a 0.7mm inner diameter stainless steel needle, and the syringe pump Control the flow rate of the precursor solution, which is about 0.1-0.8ML / h; the aluminum foil heat sink is used as the collecting plate, the needle is perpendicular to the collecting plate, and the distance is 8-15cm, and the DC high voltage source is selected as a high voltage of 8-15KV; Dry in a vacuum oven at 80°C overnight, pre-oxidize in air at 230°C for 4 hours (1°C / min), then cut into pieces, and then carbonize in argon at 700°C (5°C / min) for 2 ho...

Embodiment 2

[0025] First take the GO suspension; then take PAN (polyacrylonitrile), dihydrate tin dichloride dissolved in DMF, the concentration is 5.5% and 1.5% respectively, and mix the graphene oxide suspension as the precursor solution; the precursor solution At 60°C, stir magnetically until the mixture turns into a clear solution, and the color changes from transparent light brown to black (graphene color); the precursor solution is transferred to a 10ml syringe with a 0.7mm inner diameter stainless steel needle, and the syringe pump Control the flow rate of the precursor solution, which is about 0.1-0.8mL / h; the aluminum foil heat sink is used as the collecting plate, the needle is perpendicular to the collecting plate, and the distance is 8-15cm, and the DC high voltage source is selected as a high voltage of 8-15KV; Dry in a vacuum oven at 80°C overnight, pre-oxidize in air at 220°C for 4 hours (1°C / min), then cut into pieces, and then carbonize at 600°C (5°C / min) in argon for 2 ho...

Embodiment 3

[0028] First take the GO suspension; then take PAN (polyacrylonitrile), dihydrate tin dichloride dissolved in DMF, the concentration is 7.5% and 1.5%, respectively, mixed graphene oxide suspension, as the precursor solution; the precursor solution At 60°C, stir magnetically until the mixture turns into a clear solution, and the color changes from transparent light brown to black (graphene color); the precursor solution is transferred to a 10ml syringe with a 0.7mm inner diameter stainless steel needle, and the syringe pump Control the flow rate of the precursor solution, which is about 0.1-0.8mL / h; the aluminum foil heat sink is used as the collecting plate, the needle is perpendicular to the collecting plate, and the distance is 8-15cm, and the DC high voltage source is selected as a high voltage of 8-15KV; Dry in a vacuum oven at 80°C overnight, pre-oxidize in air at 210°C for 4 hours (1°C / min), then cut into pieces, and then carbonize at 500°C (5°C / min) in argon for 2 hours....

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a convenient method for preparing binder-free stannic oxide / carbon fibrofelt for a negative pole of a high-performance lithium ion battery. The method disclosed by the invention comprises the following steps: dissolving polyacrylonitrile and stannous chloride which have certain concentrations to a N'N-dimethyl formamide solution, magnetically stirring the solution of polyacrylonitrile, the stannous chloride and the N'N-dimethyl formamide solution until the solution is clarified, electrostatically spinning the solution, and finally annealing the obtained solution which is obtained at a high temperature twice to obtain Sn-SnOx uniformly loaded nanometer composite materials of the carbon fibrofelt. For a compound which is prepared by the method disclosed by the invention, since the electrostatic spinning method is adopted, nanometer particles of metal-metallic oxide are uniformly dispersed into buffer substrate carbon fiber, and the circulation specific capacity and the stability of materials for the negative pole of the lithium ion battery are effectively improved. The preparation technology disclosed by the invention has the advantages that the operation is simple, the cost is low, the efficiency is high, the large-scale and industrial production is easy to realize, and the application range is broad.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium-ion battery negative electrode materials, in particular to a method for preparing tin-based / carbon fiber mat high-performance lithium-ion battery negative electrode materials without binders by an electrospinning method. Background technique [0002] With the rapid development of information technology, a variety of portable electronic products have emerged. Lithium-ion batteries have become the preferred power source for various electronic products due to their advantages such as high voltage, high specific energy, long life, and low pollution. At the same time, lithium-ion batteries also have good application prospects and development space in the fields of national defense industry, space technology, and electric vehicles. At present, commercial lithium-ion batteries mainly use carbon materials as negative electrode active materials. Scientific researchers have done a lot of res...

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): H01M4/1393H01M4/1391
CPCH01M4/1391H01M4/1393Y02E60/10
Inventor 张明闫飞龙唐轩卫月华杨婷王太宏
Owner HUNAN 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