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Separator comprising flame retardant layer and method of making same

A technology of flame retardant and flame retardant synergist, applied in the direction of final product manufacturing, sustainable manufacturing/processing, separators/films/diaphragms/spacer elements, etc. Dosage restrictions, etc.

Pending Publication Date: 2022-04-19
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of adding a flame retardant to the coating 200, the flame retardant that can be added may be limited
Also, the coating 200 that supplements the physical properties of the separator may not work properly with the addition of flame retardants in excess

Method used

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  • Separator comprising flame retardant layer and method of making same
  • Separator comprising flame retardant layer and method of making same
  • Separator comprising flame retardant layer and method of making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] (Example 1 (hereinafter referred to as B1))

[0080] Such as figure 2 As shown, a flame retardant layer is formed on one surface, and a coating is formed on the flame retardant layer.

[0081] Based on the total solid content, a slurry was produced by mixing 85% by weight of ammonium polyphosphate and 15% by weight of a binder with each other, and coating the slurry on one surface of a polyolefin substrate so as to have a thickness of 1 μm, to form a flame retardant layer.

[0082] Pass 75% by weight Al based on total solids content 2 o 3 and 25% by weight of a binder and a dispersant were mixed with each other to prepare a slurry, and the slurry was coated on the flame retardant layer so as to have a thickness of 4 μm to form a coating layer.

Embodiment 2

[0083] (Example 2 (hereinafter referred to as B2))

[0084] Such as image 3 As shown, flame retardant layers are formed on two opposing surfaces, and a coating is formed on only one of the flame retardant layers.

[0085] A portion having only a flame retardant layer was formed by coating a paste including a flame retardant material on one surface of the polyolefin substrate so as to have a thickness of 5 μm.

[0086] A slurry formed by mixing 85% by weight of ammonium polyphosphate and 15% by weight of a binder with each other was used as the slurry including the flame retardant material based on the total solid content.

[0087] A portion where the coating layer is formed on the flame retardant layer is formed on the surface of the polyolefin substrate opposite to the portion having only the flame retardant layer.

[0088] At this time, based on the total solid content, a slurry was prepared by mixing 85% by weight of ammonium polyphosphate and 15% by weight of a binder w...

Embodiment 3

[0089] (Embodiment 3 (hereinafter referred to as B3))

[0090] Such as Figure 4 As shown, flame retardant layers are formed on two opposing surfaces, and a coating is formed on each flame retardant layer.

[0091] Based on the total solid content, a slurry was prepared by mixing 85% by weight of ammonium polyphosphate and 15% by weight of a binder with each other, and coating the slurry on the corresponding surface of a polyolefin substrate so as to have a thickness of 1 μm. Each flame retardant layer is formed.

[0092] Pass 75% by weight Al based on total solids content 2 o 3 and 25% by weight of a binder and a dispersant were mixed with each other to make a slurry, and the slurry was coated on one of the corresponding flame retardant layers so as to have a thickness of 4 μm to form each coating layer.

[0093] : Flame retardancy evaluation experiment

[0094] Figure 5 It is a schematic diagram showing the flame retardancy evaluation test method for comparing the exa...

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Abstract

Disclosed is a separator including a flame retardant layer between a porous substrate and a coating layer including an inorganic material formed on at least one surface of the porous substrate. And the flame retardant layer is arranged between the porous substrate and the coating, so that a rapid and accurate flame-retardant effect can be obtained.

Description

technical field [0001] This application claims priority from Korean Patent Application No. 2019-0130852 filed on October 21, 2019, the disclosure of which is hereby incorporated by reference in its entirety [0002] The present invention relates to a separator including a flame retardant layer and a method of manufacturing the same. More specifically, the present invention relates to a separator having a coating including an inorganic material formed on at least one surface of a porous substrate, and a method for manufacturing the same, wherein the separator includes between flame retardant layers. Background technique [0003] A separator, which is an element constituting a secondary battery, includes a polymer film between a positive electrode and a negative electrode, the polymer film having a porous structure. Separators are used to isolate positive and negative electrodes from each other to prevent electrical shorts between the two electrodes and to allow passage of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/491H01M50/409H01M50/403
CPCH01M50/491H01M50/409H01M50/403H01M50/451H01M10/4235H01M50/446H01M10/052H01M50/457H01M50/411H01M50/431C08K5/0066C08K3/016Y02E60/10Y02P70/50H01M50/449
Inventor 韩多庆金敏智郑邵美
Owner LG ENERGY SOLUTION LTD