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

Preparation method and application of a solid composite electrolyte and its electrolyte membrane

A composite electrolyte and solid-state technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrolytes, etc., can solve the problems of reduced lithium ion conductivity, high processing costs, and high cost of ionic glass, achieving high mechanical strength and good performance. Mechanical performance, low pollution effect

Active Publication Date: 2021-06-18
JILIN NORMAL UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: (1) at low temperature, the performance of lithium ion conduction will drop sharply, so that the battery will no longer work; (2) the main chain of lithium conducting siloxane polymer is Si-O interphase, and the branch The essence of the chain is still ethylene oxide-[CH 2 -CH 2 -O] n -
Due to the relatively high mass ratio of vulcanized glass powder, the mass ratio of the second group of polymers that provide mechanical strength is relatively small, so its mechanical properties are not high; all the examples in the technical scheme use small molecule polymers and salt solutions Solidification after adding powder, the solid itself formed by small molecule polymer has poor mechanical properties
In addition, the high cost of ionic glass will lead to high processing costs

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 a solid composite electrolyte and its electrolyte membrane
  • Preparation method and application of a solid composite electrolyte and its electrolyte membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A solid composite electrolyte comprises, by weight percentage: 85% of water-based polyurethane, 10% of lithium perchlorate and 5% of attapulgite coated with amino graphene. When the solid composite electrolyte is prepared into an electrolyte membrane, it includes: mixing and stirring the above-mentioned aqueous polyurethane and aminographene-coated attapulgite according to the above weight percentage to obtain a polyurethane composite, and adding perchloric acid to the polyurethane composite Lithium, to obtain a lithium-doped polyurethane composite emulsion, and then dry at 60°C for 30 hours under vacuum conditions to obtain a solid composite electrolyte membrane.

[0023]Wherein, the waterborne polyurethane is synthesized by the following method: by weight, 35 parts of poly(1,4-butylene carbonate) diol and 40 parts of isophorone diisocyanate are reacted at 70°C for 5 hours, and then added 2 parts of dimethylolpropionic acid, 0.1 part of NMP and stannous octoate, contin...

Embodiment 2

[0026] A solid composite electrolyte, comprising: 95% of water-based polyurethane, 1% of lithium bistrifluoromethanesulfonimide, and 4% of attapulgite coated with amino graphene. When preparing the solid composite electrolyte into an electrolyte membrane, it includes: mixing and stirring the above-mentioned aqueous polyurethane and aminographene-coated attapulgite according to the above weight percentage to obtain a polyurethane composite, and adding lithium salt to the polyurethane composite, The lithium-doped polyurethane composite emulsion was obtained, and then dried at 100° C. for 20 h under vacuum conditions to obtain a solid composite electrolyte membrane.

[0027] Wherein, the waterborne polyurethane is synthesized by the following method: by weight, 65 parts of poly(1,5-pentanediol carbonate) diol and 40 parts of hexamethylene diisocyanate are reacted at 90°C for 3 hours, and then added 8 parts of dimethylolbutyric acid, NMP and 0.01 part of di-n-butyltin dilaurate, c...

Embodiment 3

[0030] A solid composite electrolyte, comprising, by weight percentage: 90% of water-based polyurethane, 8% of lithium bisfluorosulfonimide and 2% of attapulgite coated with amino graphene. When preparing the solid composite electrolyte into an electrolyte membrane, it includes: mixing and stirring the above-mentioned aqueous polyurethane and aminographene-coated attapulgite according to the above weight percentage to obtain a polyurethane composite, and adding difluorosulfonic acid to the polyurethane composite Lithium imide to obtain a lithium-doped polyurethane composite emulsion, and then dry at 80° C. for 25 hours under vacuum to obtain a solid composite electrolyte membrane.

[0031] Wherein, the water-based polyurethane is synthesized by the following method: by weight, 50 parts of poly(1,6-hexanediol carbonate) diol and 30 parts of toluene diisocyanate are reacted at 80° C. for 4 hours, and then dimethylol is added 5 parts of propionic acid, 0.05 parts of NMP and organ...

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 present invention proposes a solid composite electrolyte membrane and a preparation method and application thereof. The solid composite electrolyte includes raw materials by weight percentage: 85-95% of water-based polyurethane, 1-10% of lithium salt and amino graphene coating Attapulgite 1‑5%. The preparation method of the electrolyte membrane comprises: mixing and stirring water-based polyurethane and aminographene-coated attapulgite to obtain a polyurethane composite, adding lithium salt to the polyurethane composite to obtain a lithium-doped polyurethane composite emulsion, Then dry it to form a film to obtain a solid composite electrolyte membrane. The solid composite electrolyte membrane of the present invention uses water-based polyurethane and aminographene-coated attapulgite as the material skeleton of the solid composite electrolyte, which not only endows the electrolyte with high ion conductivity in a relatively large temperature range, but also has good mechanical properties .

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a solid composite electrolyte membrane and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long service life and no memory effect, and have been widely used in electronic devices such as mobile phones, computers, digital cameras, drones, robots and sports bracelets. In addition, lithium-ion batteries are also used as the main energy storage devices in the field of new energy vehicles. However, the current preparation of lithium-ion batteries mainly uses liquid organic electrolytes, which have safety hazards such as volatile, flammable, easy to leak, and easy to explode, which restricts the development of lithium-ion batteries. In order to solve the safety problems of lithium-ion batteries, solid-state polymer electrolytes are used to prepare all-solid-state lithium-ion batteri...

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 Patents(China)
IPC IPC(8): H01M10/056H01M10/0525H01M10/058
CPCH01M10/0525H01M10/056H01M10/058H01M2300/0094Y02E60/10Y02P70/50
Inventor 魏茂彬李淑梅曹健张勇徐婷
Owner JILIN NORMAL 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