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

Modified polyimide binder, preparation method and application thereof

A technology of polyimide and binder, which is applied in the field of materials, can solve the problems of low electrical conductivity of polymers, and achieve the effects of improving flexibility, good mechanical stability, and reducing impedance

Active Publication Date: 2021-07-27
TIANMU LAKE INST OF ADVANCED ENERGY STORAGE TECH CO LTD +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a modified polyimide binder and its preparation method and application, which are used to improve the cycle stability and overcharge safety of lithium-ion batteries, and at the same time solve the problem of low conductivity of the polymer itself

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
  • Modified polyimide binder, preparation method and application thereof
  • Modified polyimide binder, preparation method and application thereof
  • Modified polyimide binder, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] This embodiment provides a lithium ion battery negative electrode binder, which is a modified polyimide polymer, and its structural formula is: Wherein, m:n=4:1.

[0072] The preparation method of the modified polyimide binder of the present embodiment is: with 8mmol and 2 mmol of Dissolve the diamine monomer in 40ml N-methylpyrrolidone, continuously feed nitrogen gas, stir at room temperature to fully dissolve it, then add 10.02mmol dianhydride monomer Stir at room temperature for 12 hours to obtain a polymer solution. After the reaction is completed, add 300ml of deionized water into the polymer solution to stir and precipitate. After washing and suction filtering, the obtained precipitate is vacuum-dried at 60°C for 12 hours to obtain a fibrous white and light yellow polyamic acid solid powder, the structural formula is

[0073] The above polyamic acid solid powder was dissolved in N-methylpyrrolidone, fully stirred at 15° C. to dissolve it completely, and ...

Embodiment 2

[0088] This embodiment provides a lithium ion battery negative electrode binder, which is a modified polyimide polymer, and its structural formula is: Wherein, m:n=3:1.

[0089] The preparation method of the modified polyimide binder of the present embodiment is: the and 2.5mmol of Dissolve the diamine monomer in 40ml N-methylpyrrolidone, continuously feed nitrogen gas, stir at room temperature to fully dissolve it, then add 10.02mmol dianhydride monomer Stir at room temperature for 12 hours to obtain a polymer solution. After the reaction is completed, add 300ml of deionized water into the polymer solution to stir and precipitate. After washing and suction filtration, the obtained precipitate is vacuum-dried at 60°C for 12 hours to obtain a fibrous white and light yellow polyamic acid polymer. solid powder.

[0090] The preparation method of the negative electrode sheet and the battery assembly process are the same as those in Example 1.

[0091] The negative pole pi...

Embodiment 3

[0095] This embodiment provides a lithium ion battery negative electrode binder, which is a modified polyimide polymer, and its structural formula is: Wherein, m:n=3:2.

[0096] The preparation method of the modified polyimide binder of the present embodiment is: the and 4mmol of Dissolve the diamine monomer in 40ml N-methylpyrrolidone, continuously feed nitrogen gas, stir at room temperature to fully dissolve it, and then add 10.02mmol dianhydride monomer Stir at room temperature for 12 hours to obtain a polymer solution. After the reaction is completed, add 300ml of deionized water into the polymer solution to stir and precipitate. After washing and suction filtration, the obtained precipitate is vacuum-dried at 60°C for 12 hours to obtain a fibrous white and light yellow polyamic acid polymer. solid powder.

[0097] The preparation method of the negative electrode sheet and the battery assembly process are the same as those in Example 1.

[0098] The negative pole 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

No PUM Login to View More

Abstract

The invention relates to a modified polyimide binder, a preparation method and application thereof, wherein the modified polyimide binder has a structural general formula defined in the specification, m:n is 5:1-1:5, the polymerization degree m+n is an integer from 100 to 5000, the structural formula of R1 contains a self-repairing functional group, the self-repairing functional group is a functional group containing a disulfide bond or a polysulfide bond of a dynamic reversible covalent bond, the structural formulas of R2 and R3 have conjugated structures, and R2 and R3 respectively comprise any one of an aromatic compound, a heterocyclic compound, an aromatic derivative or a heterocyclic derivative.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a modified polyimide binder and its preparation method and application. Background technique [0002] Lithium-ion batteries have excellent characteristics such as high energy density, long cycle life, low self-discharge rate, and no memory effect. They gradually replace traditional lead-acid batteries and nickel-cadmium batteries, and are widely used in portable electronic devices. In order to further expand the commercial application of lithium-ion batteries, major challenges have been raised in terms of high-power output performance and safety performance. Among them, many electrochemical properties of lithium-ion batteries, such as stability and irreversible capacity loss, are closely related to the performance of the binder. [0003] Since the theoretical capacity of the traditional graphite negative electrode is only 372mAh / g, the theoretical capacity of the silicon mater...

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): C08G73/10H01M4/62H01M4/13H01M10/0525
CPCC08G73/1064C08G73/1042C08G73/1067C08G73/1007H01M4/622H01M4/13H01M10/0525Y02E60/10
Inventor 桂鲁哲桂客李泓
Owner TIANMU LAKE INST OF ADVANCED ENERGY STORAGE TECH CO LTD
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