Separator without separator substrate

The technology of a diaphragm and a porous diaphragm is applied in the field of diaphragms without a diaphragm base material, and can solve the problems of a diaphragm without a polyolefin base material, and the improvement of the strength of the diaphragm is not disclosed.

Active Publication Date: 2020-08-11
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this non-patent document does not disclose a method for increasing the strength of the diaphragm
[0014] That is, the prior art has not proposed an effective technique capable of providing a separator without a polyolefin base material, wherein the separator exhibits high stability in a high temperature environment, high insulation, higher tensile strength and elongation , excellent electrolyte impregnation characteristics and high ion transfer ability, thus solving the above problems

Method used

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  • Separator without separator substrate
  • Separator without separator substrate
  • Separator without separator substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] The slurry was made such that the content of solids comprising boehmite (AlO(OH)) as inorganic particles, Polyvinylidene fluoride-hexafluoropropylene copolymer (PVdF-HFP, 5130) and a compound represented by Chemical Formula 4 as a crosslinking agent.

[0118] Specifically, 28.08 g of boehmite (AlO(OH)), 7.2 g of PVdF-HFP, and 0.72 g of the compound represented by Chemical Formula 4 were added to 164 g of acetone to manufacture a slurry. The slurry was formed to have a shape of a separator, and then dried at 150° C. for 30 minutes to manufacture a separator. After the crosslinking reaction, the separator was further dried at ambient temperature to complete the separator.

Embodiment 2

[0120] A separator was produced using the same method as in Example 1, except that 0.0072 g of 2,2'-azobis(isobutyronitrile) as an initiator was added to the slurry produced according to Example 1.

Embodiment 3

[0122] A separator was manufactured using the same method as in Example 1, except that the compound represented by Chemical Formula 5 was used instead of the compound represented by Chemical Formula 4 in the slurry of Example 1.

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Abstract

The present invention relates to a porous separator for use in an electrochemical element to secure electric insulation between a cathode and an anode, wherein the separator contains inorganic particles, a binder for binding the inorganic particles, and a cross-linker, but does not contain a polyolefin substrate.

Description

technical field [0001] This application claims priority and benefit from Korean Patent Application No. 2018-0055138 filed May 14, 2018, the disclosure of which is incorporated herein by reference in its entirety. [0002] The present invention relates to a separator without a separator substrate, and more particularly to a separator which does not contain a polyolefin substrate used as a separator substrate, and which contains inorganic particles and a polymeric compound for binding the inorganic particles material adhesive. Background technique [0003] With the trend towards lighter weight and higher performance of portable devices such as smartphones, portable computers, tablet PCs, and portable game consoles, there is an increasing demand for secondary batteries used as their driving power sources. In the past, nickel-cadmium, nickel-hydrogen, and nickel-zinc batteries have been used, but lithium secondary batteries with high operating voltage and high energy density pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/42H01M10/052H01M50/443H01M50/489
CPCH01M10/052Y02E60/10H01M50/414H01M50/429H01M50/434H01M50/443H01M50/446H01M50/403H01M10/0565H01M2300/0091H01M50/489H01M10/4235C08K3/22C08K2003/2227H01M10/0525
Inventor 安庆昊南宽祐李哲行金永得李济安
Owner LG ENERGY SOLUTION LTD
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