Membrane coating liquid and water-based nano-para-aramid coated membrane

A technology of para-aramid fiber and coating liquid is applied in the field of diaphragm coating liquid and water-based nano-para-aramid fiber coating diaphragm, which can solve the problem of high product cost and achieve the effects of low cost, good reliability and good performance.

Active Publication Date: 2019-03-29
HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
View PDF9 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the existing preparation process of aramid-coated diaphragm, a large number of organic solvents are used for dissolution and extraction operatio

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
  • Membrane coating liquid and water-based nano-para-aramid coated membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Under dry inert gas atmosphere and stirring conditions (stirring speed is 400 rpm), control the system temperature at 90°C, add co-solvent calcium chloride to N-methylpyrrolidone (NMP) and dissolve it, the amount of co-solvent added Be 5% of NMP quality; Then add polyethylene glycol (addition amount is 2% of the quality of N-methylpyrrolidone), stir about 1 hour, then reaction system temperature is down to normal temperature, adds p-phenylenediamine (addition amount 2% of the quality of N-methylpyrrolidone), continue to stir, after the p-phenylenediamine dissolves completely, the temperature of the reaction system drops to 3° C. ), increase the rotating speed to 800 revolutions per minute, so that terephthaloyl chloride is completely dissolved, and continue to react for 40 minutes, then the reaction system is heated to 75 ° C, and the reaction is continued to obtain the primary polymer of p-aramid fiber;

[0038] Add N-methylpyrrolidone (addition amount is 5% of the qua...

Embodiment 2

[0042]Under dry inert gas atmosphere and stirring conditions (stirring speed is 600 rpm), control the system temperature at 100°C, add co-solvent calcium chloride to N-methylpyrrolidone (NMP) and dissolve it, the amount of co-solvent added It is 9% of NMP quality; Then add polyethylene glycol (7% of the quality of N-methylpyrrolidone), stir about 1 hour, then reaction system temperature is down to normal temperature, adds p-phenylenediamine (addition amount 3% of the quality of N-methylpyrrolidone), continue to stir until the temperature of the reaction system drops to 7°C after p-phenylenediamine is completely dissolved, then add terephthaloyl dichloride (p-phenylenediamine and terephthaloyl dichloride The molar ratio is 1:1.007), increase the rotation speed to 1000 rpm, so that the terephthaloyl chloride is completely dissolved, and continue to react for 50 minutes, then the reaction system is heated to 85°C, and the reaction is continued to obtain the primary polymer of p-ar...

Embodiment 3

[0047] Under dry inert gas atmosphere and stirring conditions (stirring speed is 500 rpm), control the system temperature at 95°C, add co-solvent lithium chloride to N-methylpyrrolidone (NMP) and dissolve it, the amount of co-solvent added It is 7% of NMP quality; Then add polyethylene glycol (addition is 5% of the quality of N-methylpyrrolidone), stir about 1 hour, then reaction system temperature is down to normal temperature, adds p-phenylenediamine (addition 2.5% of the quality of N-methylpyrrolidone), continue to stir, until the temperature of the reaction system drops to 5°C after p-phenylenediamine is completely dissolved, then add terephthaloyl dichloride (p-phenylenediamine and terephthaloyl dichloride The molar ratio is 1:1.01), increase the rotation speed to 900 rpm, so that the terephthaloyl chloride is completely dissolved, and continue the reaction for 45 minutes, then the reaction system is heated to 80 ° C, and the reaction is continued to obtain the primary pol...

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention provides membrane coating liquid and a water-based nano-para-aramid coated membrane. The preparation method of the membrane coating liquid comprises: adding co-solvent and polyethylene glycol into N-methyl pyrrolidone, carrying stirring and then carrying out first-time cooling, adding p-phenylenediamine and then carrying out second-time cooling, adding paraphthaloyl chloride, improving a rotating speed reaction, and carrying out temperature-rising reaction to obtain a primary polymer of para-aramid; adding N-methyl pyrrolidone, carrying out shearing at a high speed, and adding water to obtain aramid nano-fiber suspension; adding alcohol, carrying out dispersion and filtering to obtain a first solution; adding a dispersant and inorganic particles in water and carrying out dispersion and sand grinding to obtain a second solution; adding polyvinylpyrrolidone in water to obtain a third solution; mixing the first solution with the second solution, carrying out stirring, addingthe third solution, and carrying out stirring to obtain membrane coating liquid. In addition, the water-based nano-para-aramid coated membrane is prepared by using the coating liquid. According to the invention, no solvent is used for extraction; the green and environment-friendly effects are good; and the cost is low.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a diaphragm coating liquid and a water-based nano para-aramid coated diaphragm. Background technique [0002] As people pay more and more attention to new energy sources, the technology R&D and application of lithium-ion batteries are gradually expanding and maturing. As an energy carrier, the safety performance of lithium-ion batteries is one of the important criteria for evaluating the quality of a lithium-ion battery. [0003] The diaphragm is an important component in lithium batteries that can play a key protective role and greatly improve the safety performance of the battery. Compared with the traditional polyolefin separator and its derived inorganic and organic coating separators, the aramid coated separator has the advantages of anti-oxidation, acid and alkali resistance, flame retardancy, friction resistance, tear resistance, etc., and its thermomechanical strength is...

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
IPC IPC(8): H01M2/14H01M2/16B82Y30/00H01M50/403H01M50/44
CPCB82Y30/00H01M50/403H01M50/446Y02E60/10
Inventor 徐锋袁海朝李腾苏碧海
Owner HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap