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

Preparation method and application of polycarbonate-based polymer electrolyte

A polycarbonate and polymer technology, used in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of low electrochemical window and unsuitable high-nickel cathode material system, so as to eliminate environmental pollution and improve long-term performance. Cyclic stability performance, damage suppression effect

Active Publication Date: 2019-05-24
BEIJING UNIV OF TECH
View PDF12 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two carbonate-based polymer electrolytes have high ionic conductivity and good interfacial stability, but the electrochemical window is low (<4.7V), which is not suitable for application in high-nickel cathode material systems.

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
  • Preparation method and application of polycarbonate-based polymer electrolyte
  • Preparation method and application of polycarbonate-based polymer electrolyte
  • Preparation method and application of polycarbonate-based polymer electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve 3 g of ethylene carbonate and 0.8 g of lithium bistrifluoromethanesulfonimide (LiTFSI) in 5 ml of acetonitrile, stir at room temperature to dissolve completely; add 0.1 g of azobisisobutyronitrile and stir evenly. On the polytetrafluoroethylene mold, using whatman membrane as a porous support framework, scrape-coat the evenly stirred mixture on both sides of whatman membrane; heat at 80°C for 10 hours in a vacuum oven to solidify to form a film.

Embodiment 2

[0031] Dissolve 1g of ethylene carbonate and 0.25g of lithium bistrifluoromethanesulfonylimide (LiTFSI) into 1.5ml of N-methylpyrrolidone (NMP), stir at room temperature to dissolve completely; add 0.02g of azobis Isobutyronitrile was stirred evenly. On the polytetrafluoroethylene mold, using whatman membrane as a porous support framework, scrape-coat the evenly stirred mixture on both sides of whatman membrane; heat at 80°C for 10 hours in a vacuum oven to solidify to form a film.

Embodiment 3

[0033] Dissolve 1.38g of ethylene carbonate and 0.4g of lithium bistrifluoromethanesulfonylimide (LiTFSI) into 1.5ml of N-methylpyrrolidone (NMP), stir at room temperature to dissolve completely; add 0.02g of bis( acetylacetonate) dibutyltin and stir evenly. On the polytetrafluoroethylene mold, using whatman membrane as a porous support framework, scrape-coat the evenly stirred mixture on both sides of whatman membrane; heat at 80°C for 10 hours in a vacuum oven to solidify to form a film.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method and application of a polycarbonate-based polymer electrolyte and belongs to the technical field of lithium ion batteries. According to the preparation method of the present invention, vinyl ethylene carbonate, conductive lithium salt, a porous support material, and a solvent are adopted to prepare the polymer electrolyte. The preparation process of thepolymer electrolyte is simple, easy to control, and has excellent mechanical properties; the thickness of the polymer electrolyte ranges from 50-500 microns; the room temperature ionic conductivity of the polymer electrolyte is larger than 10<-3> S cm<-1>; and the electrochemical window of the polymer electrolyte is larger than 4.7 V. According to the polymer electrolyte adopted, the growth of lithium negative pole dendritic crystals can be effectively inhibited, and the compatibility of the polymer electrolyte with an interface and the long cycle performance of the polymer electrolyte can beimproved. With the polymer electrolyte adopted, a solid-state lithium ion battery can work for a long time at room temperature. The polymer electrolyte has good flexibility and is suitable for flexible lithium ion battery devices of wearable electronic devices.

Description

technical field [0001] The invention relates to the field of polymer electrolytes for lithium-ion batteries, in particular to the preparation of a novel polycarbonate-based polymer electrolyte and its application in solid-state lithium-ion batteries, belonging to the technical field of lithium-ion batteries. Background technique [0002] In recent years, lithium-ion batteries have become more and more widely used due to their high energy density and good reliability. However, commercial batteries mostly use conventional organic liquid electrolytes, such as ethylene carbonate, propylene carbonate, etc. The safety defects such as high chemical activity, volatility, easy fire, and explosion of organic electrolytes have seriously hindered the further popularization and application of lithium-ion batteries. In addition, when lithium metal is used as the negative electrode, lithium dendrites will be formed on the surface of lithium metal with the continuous intercalation and extr...

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): H01M10/0565H01M10/058H01M10/0525
CPCH01M10/0565H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 尉海军林志远郭现伟
Owner BEIJING UNIV OF 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