Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of solid polymer electrolyte and preparation method thereof

A technology of solid polymers and electrolytes, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc. It can solve the problems of poor high-current discharge capacity of batteries, slow migration of lithium ions in interface impedance, and affecting battery rate performance.

Active Publication Date: 2021-05-07
吉林省东驰新能源科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the extremely large interface impedance makes the migration of lithium ions in solid-state batteries slower, which in turn leads to poor high-current discharge capabilities of the batteries and affects the rate performance of the batteries.

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
  • A kind of solid polymer electrolyte and preparation method thereof
  • A kind of solid polymer electrolyte and preparation method thereof
  • A kind of solid polymer electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The invention provides a method for preparing a solid polymer electrolyte, comprising the following steps:

[0033] 1) first mixing the lithium salt, polyethylene oxide, auxiliary reagent and acetonitrile to obtain a raw material premix; the auxiliary reagent includes a rigid crosslinking agent and / or a flexible crosslinking agent;

[0034] 2) The raw material premix and the photoinitiator are mixed for the second time and left to stand to obtain a precursor solution;

[0035] 3) The precursor solution is poured on a flat plate, followed by light irradiation and drying to obtain a solid polymer electrolyte.

[0036] In the present invention, lithium salt, polyethylene oxide, auxiliary reagent and acetonitrile are first mixed to obtain a raw material premix. In the present invention, the polyethylene oxide is used as the main material of the solid polymer electrolyte, and its average molecular weight is preferably 400-5,000,000, more preferably 1,000-2,000,000, and most...

Embodiment 1

[0054] 1g of polyethylene oxide with a molar mass of 100000g / mol, 0.5g of the compound shown in formula I-1, 0.5g of tetraethylene glycol dimethyl ether, 0.3824g of lithium bistrifluoromethanesulfonimide and 1mL of anhydrous Acetonitrile was mixed, and stirred at a speed of 300r / min for 12h to obtain a raw material premix;

[0055] The raw material premix and 0.03g of 2-hydroxy-2-methyl-1-phenyl-1-propanone were mixed and heated, stirred at a speed of 300r / min at 50°C for 2h and then left to stand for 1h to obtain a precursor solution;

[0056] At 30°C, 0.5 g of the precursor solution was poured on a polytetrafluoroethylene flat plate using a spatula with a groove depth of 250 μm, and then a polyethylene film was covered on the poured polytetrafluoroethylene flat plate; The polytetrafluoroethylene plate of the ethylene film is irradiated under ultraviolet light for 15 minutes, wherein the wavelength of ultraviolet light is 365nm, and the intensity of ultraviolet light is 150m...

Embodiment 2

[0065] 1g of polyethylene oxide with a molar mass of 100000g / mol, 0.5g of the compound shown in formula I-2, 0.5g of tetraethylene glycol dimethyl ether, 0.3824g of lithium bistrifluoromethanesulfonimide and 1mL of anhydrous Acetonitrile was mixed, and stirred at a speed of 300r / min for 12h to obtain a raw material premix;

[0066] The raw material premix and 0.03g of 2-hydroxy-2-methyl-1-phenyl-1-propanone were mixed, heated, stirred at 300r / min for 2h at 50°C, and left to stand for 1h to obtain the precursor body solution;

[0067] At 30°C, 2 g of the precursor solution was poured on a polytetrafluoroethylene flat plate using a spatula with a groove depth of 250 μm, and then a polyethylene film was covered on the poured polytetrafluoroethylene flat plate; The PTFE plate of the film is irradiated with ultraviolet light for 15 minutes, wherein the wavelength of ultraviolet light is 365nm, and the intensity of ultraviolet light is 150mW / cm 2 After the light irradiation, the p...

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
wavelengthaaaaaaaaaa
electrical conductivityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of lithium ion batteries, in particular to a solid polymer electrolyte and a preparation method thereof. The invention provides a method for preparing a solid polymer electrolyte, comprising the following steps: first mixing lithium salt, polyethylene oxide, auxiliary reagents and acetonitrile to obtain a raw material premix; mixing the raw material premix with photoinitiated The reagents are mixed for the second time and left to stand to obtain a precursor solution; the precursor solution is poured on a flat plate, subjected to light irradiation to generate a free radical crosslinking reaction, and then dried. In the present invention, polyethylene oxide, auxiliary reagents and photoinitiators undergo a free radical crosslinking reaction under light irradiation conditions, forming an electrolyte with a 3D spatial network structure, which reduces the crystallization of polyethylene oxide The degree increases the amorphous region of polyethylene oxide, accelerates the transport of lithium ions, and improves the room temperature conductivity of the electrolyte.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a solid polymer electrolyte and a preparation method thereof. Background technique [0002] With the rapid development of the new energy vehicle industry, the production of power batteries with high energy density and high safety has become an unremitting goal in this field. Lithium metal is due to its low reduction potential (-3.040V vs. standard hydrogen electrode) and high theoretical specific capacity (3860mAh g -1 ), used as the anode material of the power battery can greatly improve the energy density of the battery, and has become the focus of attention. [0003] At present, commercial lithium-ion batteries generally use an organic electrolyte system. When lithium metal is selected as the negative electrode, the lithium negative electrode is very likely to have a side reaction with the organic electrolyte during the charge-discharge cycle to form dendrites, ...

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): H01M10/058H01M10/0565
CPCH01M10/0565H01M10/058Y02E60/10Y02P70/50
Inventor 谢海明孙立群付芳丛丽娜
Owner 吉林省东驰新能源科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com