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Method for improving properties of separator through post-treatment crosslinking and separator thereby

A technology of physical properties and separators, which is applied to structural parts, battery pack components, electrical components, etc., can solve problems such as the physical properties of separators that have not yet been proposed, and achieve the effect of improving insulation and tensile strength

Active Publication Date: 2020-03-24
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no method has been proposed to improve the physical properties of separators by post-processing the already fabricated separators.

Method used

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  • Method for improving properties of separator through post-treatment crosslinking and separator thereby
  • Method for improving properties of separator through post-treatment crosslinking and separator thereby
  • Method for improving properties of separator through post-treatment crosslinking and separator thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0094] Hereinafter, the present invention will be described in detail with reference to the following examples and test examples; however, the present invention is not limited by these examples and test examples. The embodiments can be modified into various other forms, and the scope of the present invention should not be construed as being limited by the embodiments that will be described in detail. These embodiments are provided to explain the present invention more fully to those of ordinary skill in the art to which the present invention belongs.

[0095]

[0096] (Manufacture of partitions 1 and 2)

[0097] For experimental purposes, two already produced separators, CSP gen1 (separator 1) and BA1_B09PA1 (separator 2) were used. CSP gen1 separator only made of alumina Al 2 O 3 Made of granules and PVDF binder. The BA1_B09PA1 separator has a polyethylene (polyethylene) substrate including Al 2 O 3 Coating of inorganic particles and PVDF binder.

[0098] Triethylamine (TEA, Trie...

comparative test 1

[0101] Comparative Examples 1 and 2 were prepared by not treating the separators 1 and 2. Examples 1 and 2 were prepared by subjecting only the separators 1 and 2 according to the present invention to TEA treatment. Examples 3 and 4 were prepared by subjecting separators 1 and 2 to TEA and AIBN treatments. The tensile strength, elongation, insulation resistance, and electrical resistance of the separators of Comparative Examples 1 and 2, Examples 1 and 2, and Examples 3 and 4 were respectively measured under the following conditions.

[0102]

[0103] Applied voltage: 100V

[0104] Measuring time: 3S

[0105] The size and shape of the electrode: 19.6cm 2 Round

[0106]

[0107] The width of the partition: 2cm

[0108] Stretching speed: 500mm / min

[0109]

[0110] Figure 1 to Figure 4 The measurement results of the physical properties of Comparative Examples 1 and 2 and Examples 1, 2, 3, and 4 according to the present invention are shown, respectively. In the Gen1 separator, Bare is...

comparative test 2

[0113] Al 2 O 3 Before the coating made of inorganic particles and PVDF binder is formed on the separator 2, in the slurry preparation process of the coating material, triethylamine (TEA, Triethylamine) and After cross-linking 2,2'-azobis(isobutyronitrile) (AIBN, 2,2'-azobis (isobutyronitrile)) to prepare a slurry, the slurry was coated on the separator 2 to prepare a comparison Example 3. The separators of Comparative Example 3 and Example 4 treated with triethylamine (TEA) and 2,2'-azobis(isobutyronitrile) (AIBN) were measured under the following conditions, respectively Tensile strength, elongation, insulation resistance and electrical resistance.

[0114]

[0115] Applied voltage: 100V

[0116] Measuring time: 3S

[0117] The size and shape of the electrode: 19.6cm 2 Round

[0118]

[0119] The width of the partition: 1.5cm

[0120] Stretching speed: 500mm / min

[0121]

[0122] Figure 5 with Image 6 The measurement results of the physical properties of Comparative Example 3 (In...

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Abstract

The present invention relates to a method for improving properties of a separator so as to allow the separator to have enhanced insulating properties, tensile strength, and elongation, and to a separator having improved properties through the method. Especially, the present invention is characterized by being applied to an already manufactured separator. A crosslinkage may be formed through a double bond after the formation of the double bond in the already manufactured separator, or a crosslinkage may be formed by adding a separate crosslinkage initiator to the already manufactured separator.

Description

Technical field [0001] This application claims the priority and rights of Korean Patent Application No. 2018-0043356 filed on April 13, 2018 and Korean Patent Application No. 2019-0042803 filed on April 12, 2019. The above patent applications are incorporated by reference. The disclosures of is incorporated here as a whole. [0002] The present invention relates to a method for improving the physical properties of a separator through post-treatment crosslinking and a separator prepared therefrom. In particular, the present invention relates to a method comprising forming crosslinkable sites on an adhesive molecule and crosslinking the crosslinkable sites by post-processing a completed separator including an olefin substrate or not including an olefin substrate To improve the insulation performance and mechanical properties of the separator, and a separator with improved physical properties through post-treatment cross-linking. The separator of the present invention can be used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22H01M2/14H01M2/16C08K5/14C08K5/23C08K5/00C08K5/17H01M50/403H01M50/417H01M50/426H01M50/489H01M50/494
CPCC08K5/14C08K5/17C08K5/23C08K5/0025C08K3/22C08K2003/2227Y02E60/10H01M50/446H01M50/461H01M50/403H01M50/417H01M50/489H01M50/494H01M50/426C08J5/18C08J7/0427C08J2323/06C08J2327/16C08J2427/16C08K5/00H01M50/414H01M50/449C08L27/16C08J5/2231C08J5/2287C08J7/16C08J2300/00C08K2201/001
Inventor 金英馥金敏智南宽祐李济安
Owner LG ENERGY SOLUTION LTD
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