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

In-situ polymerized polymer solid electrolyte as well as preparation method and application thereof

A solid-state electrolyte and in-situ polymerization technology, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as the gap in large-scale commercial applications, and achieve the effect of improving safety performance and improving ionic conductivity

Pending Publication Date: 2022-07-29
力容新能源技术(天津)有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still a big gap from large-scale commercial application

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
  • In-situ polymerized polymer solid electrolyte as well as preparation method and application thereof
  • In-situ polymerized polymer solid electrolyte as well as preparation method and application thereof
  • In-situ polymerized polymer solid electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1, in-situ polymerized PEO cross-linked main chain structure polymer electrolyte preparation (process such as figure 1 Shows):

[0039] (1) The design reaction monomer is: a bifunctional monomer and R 1 for CH 3 , that is, the structure is a bifunctional monomer with methacrylate groups at both ends, the number of repeating units in the middle segment (C-C-O) is n is 13, and the polymer name is polyethylene glycol dimethacrylate (PEGDMA-n13) ; Mix the reaction monomer 9.9g with the additive VC 0.1g, stir for 12h to make it evenly dispersed;

[0040] (2) Lithium salt LiTFSI (0.5 g) was added to the mixed liquid, stirred at 60° C. for 48 hours, and stood for 48 hours.

[0041](3) The initiator AIBN (0.05 g) was added to the mixed solution, stirred for 5 minutes, and then rapidly injected into the cell for in-situ polymerization by applying a vacuum-pumping liquid injection process.

[0042] (4) The battery core is evacuated before the electrolyte is injected, ...

Embodiment 2

[0046] Example 2: The only difference between Example 2 and Example 1 is that n=9 in the bifunctional monomer in the reaction monomer, and the polymer name is polyethylene glycol dimethacrylate (PEGDMA-n9), Preparation of solid electrolyte film, the test ionic conductivity is 9.84*10 -6 S / cm. Studies have shown that too small a degree of polymerization can not complete the purpose of migrating ions, while too large a degree of polymerization will affect its crystallinity, so it cannot meet the requirements of the subsequent in-situ polymerization process. After bulk polymerization, it can not only meet the requirements of in-situ polymerization, but also improve the electrical conductivity. When n=13, the ionic conductivity is the highest.

Embodiment 3

[0047] Example 3: The only difference between Example 3 and Example 1 is that the reaction monomer is a mixture of a bifunctional monomer and a monofunctional monomer, wherein the bifunctional monomer is the compound of formula (I), and R 1 for CH 3 , n=13, the polymer name is polyethylene glycol dimethacrylate (PEGDMA-n13); the monofunctional monomer is the compound of formula (II), and R 2 is H, m=9, and the polymer name is polyethylene glycol methacrylate (PEGMA-n9); the mixing ratio of difunctional monomer and monofunctional monomer is 80:19. Preparation of solid electrolyte film, the test ionic conductivity is 1.25*10 -5 S / cm.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of solid electrolytes, and particularly relates to an in-situ polymerization polymer solid electrolyte as well as a preparation method and application thereof. The polymer solid electrolyte comprises a PEO cross-linked main chain structure formed by polymerizing long-chain monomers; or the PEO cross-linked main chain structure is formed by polymerizing long-chain monomers, and the comb-shaped side chain is further polymerized at one end of the PEO main chain; or the PEO comb polymer is formed by polymerizing a long-chain monomer, and is formed by polymerizing a monofunctional monomer (II). The solid electrolyte provided by the invention takes PEO as a main chain, contains a group which migrates ions through chain segment movement, and ensures that the group is kept in a non-crystalline amorphous state. The structure and the polymerization degree of the reaction monomer are precisely designed, so that the reaction monomer is ensured to be liquid with certain flowability, and the subsequent in-situ polymerization process is convenient to carry out; the reaction monomer does not have a crystalline region and has enough length and space to migrate lithium ions, and the ionic conductivity is maximum.

Description

technical field [0001] The invention belongs to the field of solid electrolytes, and in particular relates to an in-situ polymerized polymer solid electrolyte and a preparation method and application thereof. Background technique [0002] As an electrolyte material for solid-state batteries, PEO has incomparable advantages over other raw materials, such as sufficient raw materials, low price, and simple preparation process. At the same time, PEO film has better mechanical properties and toughness, and better safety performance. Compared with the preparation of lithium batteries, the preparation process of PEO-based solid-state batteries is simple. However, as a solid electrolyte, the biggest problem of PEO is the low ionic conductivity at room temperature. The main reason for its low ionic conductivity is that PEO is in the crystalline region at room temperature, and the ionic conductivity of the crystalline region is usually very low. [0003] PEO exhibits different morp...

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): H01M10/0565H01M10/0525H01M10/0587C08F299/02
CPCH01M10/0565H01M10/0525H01M10/0587C08F299/026
Inventor 张海源何凡王建伟刘萍金大卫
Owner 力容新能源技术(天津)有限公司
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