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

Method for preparing high invasive lithium ion battery diaphragm

A lithium-ion battery and wettability technology, which is applied in the field of modification of lithium-ion battery separators, can solve the problems of high price of processing equipment, impact on industrialized use, and high cost of raw materials, and achieves improved electrophilicity, convenient operation, and wettability. Good results

Inactive Publication Date: 2015-08-26
HENAN NORMAL UNIV
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing equipment prices of these methods are relatively high, the procedures are cumbersome and the cost of raw materials is also relatively high, thus affecting its large-scale industrial use

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
  • Method for preparing high invasive lithium ion battery diaphragm
  • Method for preparing high invasive lithium ion battery diaphragm
  • Method for preparing high invasive lithium ion battery diaphragm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Soak the polypropylene microporous membrane in the mixed solution of nitric acid and hydrogen peroxide (the volume ratio of nitric acid and hydrogen peroxide is 1:5, the mass concentration of nitric acid is 98%, and the mass concentration of hydrogen peroxide is 35%), sealed and placed at 25°C React in a water bath for 48 hours, clean with deionized water / ethanol, and dry naturally. After trimming, place it in a vacuum oven at 40°C for 24 hours to obtain a highly wettable lithium-ion battery separator.

Embodiment 2

[0016] Soak the polypropylene microporous membrane in a mixed solution of nitric acid and potassium permanganate (the mass ratio of nitric acid to potassium permanganate is 100:1, and the mass concentration of nitric acid is 98%), and seal it in a water bath at 25°C After reacting for 48 hours, clean it with deionized water / ethanol, dry it naturally, cut the edges and put it in a vacuum oven at 40°C to dry for 24 hours to obtain a lithium-ion battery separator with high wettability.

Embodiment 3

[0018] Soak the polypropylene microporous membrane in a mixed solution of nitric acid and potassium persulfate (the mass ratio of nitric acid to potassium persulfate is 100:2.5, and the mass concentration of nitric acid is 98%), seal it and place it in a water bath at 25°C for 48 hours , cleaned with deionized water / ethanol, dried naturally, cut the edges and placed in a vacuum oven at 40°C for 24 hours to obtain a highly wettable lithium-ion battery separator.

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
thicknessaaaaaaaaaa
porosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a high invasive lithium ion battery diaphragm, which belongs to the modification technology field. The method for preparing the high invasive lithium ion battery diaphragm comprises the steps: a lithium-ion battery diaphragm is immersed in mixed solution which is formed through nitric acid, hydrogen peroxide, potassium peroxodisulfate or potassium permanganate, and is placed into 30-60 DEG C thermostatic waterbath to react for 24-72h after being sealed, then is naturally dried after being cleaned through detergent, and obtains the high invasive lithium ion battery diaphragm by being dried for 12-72h in 30-60 DEG C in a vacuum mode after being cut. The high invasive lithium ion battery diaphragm which is prepared through the method is uniform in aperture, excellent in wettability and high in ionic conductivity, improves hydrophilic and electrolyte resistance, resists corrosion of electrolyte, is simple in process, strong in stability and easy to industrially use.

Description

technical field [0001] The invention belongs to the technical field of modification of lithium-ion battery diaphragms, and in particular relates to a preparation method of highly wettable lithium-ion battery diaphragms. Background technique [0002] Because of the characteristics of high energy density, high cell voltage, good rate performance, small self-discharge and environmental protection, lithium batteries are widely used in digital products, electric vehicles and electric vehicles. Most of the separator materials for lithium-ion batteries are prepared by unidirectional or bidirectional stretching of polyolefin materials. However, since most of the materials used are polyolefin materials, which are non-polar, their wettability to water and electrolyte is poor, which seriously affects their liquid absorption rate, liquid retention rate and ionic conductivity of electrolyte, etc. The electrochemical performance also affects the further modification of the separator surf...

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): H01M2/14H01M50/403
CPCH01M10/0525H01M50/403Y02E60/10
Inventor 李苞李永君代冬梅李凡常照荣
Owner HENAN NORMAL UNIV
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