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Separator for electrochemical device and electrochemical device comprising same

An electrochemical and separator technology, applied in non-aqueous electrolyte batteries, circuits, conductive coatings, etc., can solve problems such as clogging and reduced ionic conductivity, and achieve high ionic conductivity, increase peel strength, and improve capacity retention. Effect

Pending Publication Date: 2021-05-25
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The porous coating can be formed by applying a porous coating-forming slurry comprising inorganic particles and a binder polymer to a porous polymer substrate and drying the slurry, in this case, the pores of the porous polymer substrate May become clogged with porous coating forming slurry resulting in reduced ionic conductivity

Method used

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  • Separator for electrochemical device and electrochemical device comprising same
  • Separator for electrochemical device and electrochemical device comprising same
  • Separator for electrochemical device and electrochemical device comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131] Will Al 2 o 3 Inorganic particles (Nippon Light Metal, LS235, particle size 500nm), Nafion (C 7 HF 13 o 5 SC 2 f 4 ) into the solvent N-methyl-2-pyrrolidone and stirred at room temperature to prepare a uniform slurry for forming a porous coating. The volume ratio of the inorganic particles in the slurry to the ion-conducting polymer is 50:50.

[0132] The slurry was coated on both surfaces of a polyethylene porous substrate (W scope, WL11B, air permeability time 150 sec / 100 cc) by a dip coating method, and dried to manufacture a separator with a porous coating. The thickness of the porous coating is 4 μm.

Embodiment 2

[0134] A separator was manufactured by the same method as in Example 1, except that the volume ratio of the inorganic particles to the ion-conductive polymer was controlled to be 30:70.

Embodiment 3

[0136] A separator was manufactured by the same method as in Example 1, except that the volume ratio of the inorganic particles to the ion-conductive polymer was controlled to be 10:90.

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PUM

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Abstract

One purpose of the present invention is to provide a separator for an electrochemical device and an electrochemical device comprising the same, the separator comprising: a porous polymer substrate; and a porous coating layer formed on at least one surface of the porous polymer substrate and containing inorganic particles and an ionic conductive polymer, wherein the ionic conductive polymer comprises a fluorine-based copolymer in which a fluoroolefin-based segment having an anionic functional group introduced to the end or side chain thereof is contained. Provided according to an embodiment of the present invention can be a separator which has excellent ionic conductivity and is superior in terms of adhesiveness between a porous polymer substrate and a porous coating layer and an electrochemical device that has improved physical properties.

Description

technical field [0001] The present disclosure relates to a separator for an electrochemical device and an electrochemical device including the same. [0002] This application claims the benefit of Korean Patent Application No. 10-2019-0057654 filed with the Korean Intellectual Property Office on May 17, 2019, the disclosure of which is incorporated herein by reference in its entirety. Background technique [0003] Recently, interest in energy storage technologies has increased. As the field of application of energy storage technology has expanded to mobile phones, camcorders, notebook computers, and even electric vehicles, efforts have been made to research and develop electrochemical devices. In this regard, electrochemical devices have received great attention, especially the development of rechargeable secondary batteries is the focus of attention, and recently, in the development of such batteries, methods for increasing capacity density and Specific new electrode and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/044C08J9/36C09D127/22C09D7/61C09D5/24H01M50/417H01M50/426H01M50/491C08L23/06H01M50/443H01M50/489
CPCC08J7/044C08J9/365C09D127/22C09D7/61C09D5/24C08K2003/2227C08J2323/06C08J2427/22H01M50/443H01M50/491H01M50/489C08K3/22Y02E60/10C08F214/262C08F216/1475C09D127/18C09D129/10C08J5/2237C08J7/04C08J2427/18H01M50/426H01M50/446H01M50/449H01M50/497H01M10/052C08F214/26H01M50/451H01M50/431H01M50/417C08J2327/22
Inventor 尹泫雄尹鐘建河会珍
Owner LG ENERGY SOLUTION LTD