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A solid polymer electrolyte and its application in lithium metal batteries

A solid polymer, polymer technology, used in secondary batteries, secondary battery manufacturing, secondary battery repair/maintenance, etc. Weight, improved cycle performance and safety performance, effect of high ionic conductivity

Active Publication Date: 2022-03-01
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ionic conductivity of solid-state electrolytes is relatively low, making it difficult to reach practical application levels.

Method used

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  • A solid polymer electrolyte and its application in lithium metal batteries
  • A solid polymer electrolyte and its application in lithium metal batteries
  • A solid polymer electrolyte and its application in lithium metal batteries

Examples

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example 1

[0025] This example provides a solid polymer electrolyte and its application, as follows: Dissolve tris(4-aminophenyl)amine, tris(4-formylphenyl)amine and glacial acetic acid in dioxane, put In a sealed quartz glass tube, degas under the condition of liquid nitrogen bath, seal under Ar condition, and react at 120°C. After the reaction produces a solid, purify, disperse in DMF, add 2-chloro-1,1,3-trimethoxypropane, ionize, purify and dry, the resulting solid is dispersed in an aqueous solution, add 1mol / L bistrifluoromethyl Lithium sulfonyl imide solution, anion exchange, get anion as TFSI - COF-IL material, and then immerse it in 1mol / L lithium hexafluorophosphate solution at room temperature for 12 hours, then filter, separate the solid, dry, and then use a ball mill to grind it evenly, and press it into a tablet to obtain a sheet-shaped solid electrolyte. Assembled button cell; the ratio of the amount of substances of the three (4-aminophenyl) amine, three (4-formylphenyl) ...

example 2

[0029] This example provides a solid polymer electrolyte and its application, specifically as follows: Dissolve tris(4-aminophenyl)amine, tris(4-formylphenyl)amine, and strong protonic acid fluorosulfonic acid in mesitylene , placed in a sealed quartz glass tube, degassed under liquid nitrogen bath conditions, sealed under Ar conditions, and reacted at 120°C. After the reaction generates a solid, purify, disperse in DMF, add chloroacetaldehyde dimethyl acetal, ionize, purify and dry, and the obtained solid is dispersed in an aqueous solution, add 1 mol / L lithium bistrifluoromethanesulfonimide (LiTFSI) solution, anion exchanged to obtain anion as TFSI - COF-IL material, and then immerse it in 1mol / L lithium bistrifluoromethanesulfonimide solution at room temperature for 12 hours, then filter, separate the solid, dry, and then use a ball mill to grind evenly, and press into tablets. A sheet-shaped solid electrolyte is obtained, and the battery is assembled to obtain a button ba...

example 3

[0032] This example provides a solid polymer electrolyte and its application, specifically as follows: Dissolve tris(4-aminophenyl)amine, tris(4-formylphenyl)amine and noble metal salt in N,N-dimethylformaldehyde In the amide, put it into a sealed quartz glass tube, degas it under the condition of liquid nitrogen bath, seal it under the condition of Ar, and react at 120°C. After the reaction produces a solid, purify it, disperse it in DMF, add epoxybromobutane, ionize it, purify and dry it, and disperse the obtained solid in an aqueous solution, add a 1mol / L difluorooxalate lithium borate solution, and perform anion exchange to obtain an anion as TFSI - COF-IL material, and then immerse it in 1mol / L lithium trifluoromethanesulfonate solution at room temperature for 12 hours, then filter, separate the solid, dry, and then use a ball mill to grind evenly, and press into tablets to obtain flakes The solid electrolyte is used to assemble the battery to obtain a button battery; the...

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Abstract

The invention relates to a solid polymer electrolyte and its application in lithium metal batteries. The solid polymer electrolyte includes a polymer matrix and a lithium ion conductor formed in the polymer matrix. The polymer matrix is ​​an ion Ether-based inorganic-organic hybrid framework. The invention uses a bottom-up self-assembly synthesis method to fix the ionic liquid (IL) liquid electrolyte in the COF framework. Ionic liquids can dissolve lithium salts and provide lithium ion transport channels through chain segment motion, while the stable COF framework endows the polymer electrolyte with better mechanical properties and thermal stability. The COF-IL solid polymer electrolyte disclosed by the present invention has good lithium ion conductivity, thermal stability and mechanical stability, and can avoid safety problems such as battery combustion or explosion caused by leakage of traditional lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium battery materials, and relates to a lithium metal battery element, in particular to a solid polymer electrolyte for a lithium metal battery. Background technique [0002] Lithium-ion batteries have become the first choice for portable electronic products, power tools and hybrid / full electric vehicles because of their advantages such as high energy density, long cycle life, low self-discharge rate, no memory effect, stable discharge voltage, fast charge and discharge, and environmental protection. Power battery material. However, when Li-ion batteries are subjected to abuse conditions such as ultra-fast charging, discharging, or overcharging, the high specific energy density of the battery usually causes an energy response that generates enormous heat. The safety risk of Li-ion batteries remains an important challenge and unsolved hurdle, especially in systems with large size and high energy densi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/42H01M10/04H01M10/0525
CPCY02E60/10Y02P70/50
Inventor 严锋朱海李奇
Owner SUZHOU UNIV
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