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

Lithium ion battery separator and preparation method thereof, and lithium ion battery

A technology for lithium ion batteries and separators, used in secondary batteries, battery pack components, separators/films/diaphragms/spacers, etc.

Active Publication Date: 2017-08-25
SOUTH CHINA UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for the separator prepared by this method to satisfy the functions of both excellent electrolyte absorption performance and internal short circuit prevention.

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
  • Lithium ion battery separator and preparation method thereof, and lithium ion battery
  • Lithium ion battery separator and preparation method thereof, and lithium ion battery
  • Lithium ion battery separator and preparation method thereof, and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1 Preparation of three-layer composite lithium-ion battery separator

[0082] Step a: mixing the raw materials of the support layer and the dense layer with water, beating, and diluting to 0.05wt% to obtain the support layer slurry and the dense layer slurry;

[0083] Step b: the diluted support layer slurry and the dense layer slurry are independently loaded into the inclined wire paper machine (such as figure 1 shown), wherein the support layer slurry is transported to flow channel 1, and the dense layer slurry is transported to flow channel 2, so that the support layer slurry and the dense layer slurry are stacked in the same area successively, and are formed by one-time copying to obtain the support layer and the dense layer. layer;

[0084] Step c: uniformly disperse the inorganic particles in the binding resin to obtain a coating liquid, uniformly coat the coating liquid on the surface of the dense layer, and dry to obtain a lithium-ion battery separato...

Embodiment 2

[0086] Example 2 Preparation of three-layer composite lithium-ion battery separator

[0087] The preparation method of this example is basically the same as that of Example 1, except that in step a, the raw materials of the support layer and the dense layer are mixed with water, beaten, and diluted to 0.01 wt%.

Embodiment 3

[0088] Example 3 Preparation of three-layer composite lithium-ion battery separator

[0089] The preparation method of this example is basically the same as that of Example 1, except that in step a, the raw materials of the support layer and the dense layer are mixed with water, beaten, and diluted to 0.01 wt%.

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
pore sizeaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a lithium ion battery diaphragm, a preparation method of the lithium ion battery diaphragm and a lithium ion battery. The lithium ion battery diaphragm comprises a support layer, wherein either or both of a dense layer or an inorganic coating are compounded on the support layer; the average quantity of the lithium ion battery diaphragm is 8-25g / m<2>, the thickness is 15-60 mu m, the average aperture is 50-500nm, and the porosity is 78-82%. The lithium ion battery diaphragm provided by the invention is good in isolating property and excellent in electrolyte absorbing property, is further relatively high in tension strength, is capable of realizing high power capacity of a battery, and can meet the requirement of rapid large-current charge and discharge of the lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a lithium-ion battery diaphragm, a preparation method thereof and a lithium-ion battery using the diaphragm. Background technique [0002] The battery diaphragm refers to the diaphragm material between the positive electrode and the negative electrode of the battery. It is a key component of the battery. Pass freely between the negative poles. The performance of the battery separator determines the interface structure of the battery and the internal resistance of the battery, which in turn affects the capacity, cycle performance and charge-discharge current density of the battery. [0003] The separator that separates the positive and negative active materials in lithium-ion batteries needs to have the following properties: [0004] (1) It can prevent the internal short circuit caused by the contact between the positive electrode and the negative electrode active ...

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): H01M2/16H01M2/18H01M10/0525
CPCH01M10/0525H01M50/403H01M50/411H01M50/44H01M50/449H01M50/463Y02E60/10
Inventor 王习文王印奎郝静怡张洪峰
Owner SOUTH CHINA UNIV OF TECH
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