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Porous separation membrane forsecondary battery having inverse opal structure, and preparation method therefor

一种反蛋白石结构、蛋白石的技术，应用在具有反蛋白石结构的二次电池用多孔隔膜及其制造领域，能够解决粗糙表面、溶剂降低填充密度等问题，达到高孔隙度、环境友好、良好离子传导性和透气性的效果

Inactive Publication Date: 2015-11-11
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is still the problem that the application of the solvent reduces the packing density and creates a rough surface

Method used

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  • Porous separation membrane forsecondary battery having inverse opal structure, and preparation method therefor
  • Porous separation membrane forsecondary battery having inverse opal structure, and preparation method therefor
  • Porous separation membrane forsecondary battery having inverse opal structure, and preparation method therefor

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Embodiment 1

[0080] Polystyrene (PS) particles having an average diameter of 300 nm were dispersed on a glass substrate, and dried in an oven at 70° C. to obtain a 30 μm thick template film. A solution of polyetherimide dispersed in methylene chloride (5% by weight) was applied on the template film and dried in the same oven for 5 minutes to obtain a polymer resin-filled film. The film was washed with toluene for 10 minutes under sonication to remove PS particles, thereby obtaining a film with pores (porous substrate).

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Abstract

The present disclosure provides a porous separator substrate with an inverse opal structure obtained by using an engineering plastic resin with high heat-resistance, and a manufacturing method thereof. In the method, a non-crosslinked polymer resin is used to form an opal structure and a crosslinked polymer resin is penetrated into the opal structure and an organic solvent is used to remove the polymer particles being used to form the opal structure, thereby manufacturing a porous substrate with an inverse opal structure. According to the present disclosure, a separator having good porosity and air permeability can be provided without the problems of heat-resistance decrease, pore closing and thickness decrease.

Description

technical field [0001] This application claims the benefit of Korean Patent Application No. 10-2013-0131521 filed in Korea on October 31, 2013 and Korean Patent Application No. 10-2014-0150290 filed in Korea on October 31, 2014, and is adopted by It is incorporated herein by reference. The present invention relates to a separator for an electrochemical device and a manufacturing method thereof, more particularly, a porous separator for an electrochemical device comprising a porous substrate having pores of uniform size and form and a manufacturing method thereof. Background technique [0002] Recently, there has been increasing interest in energy storage technologies. As the application field of energy storage technology has expanded to mobile phones, camcorders, notebook computers, personal computers (PCs) and electric vehicles, the research and development investment in electrochemical devices capable of charging and discharging (especially lithium secondary batteries) is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M50/403H01M50/417H01M50/42H01M50/423H01M50/426H01M50/443H01M50/457H01M50/491
CPCH01M2/1653H01M2/145H01M10/052C08J9/26C08J2201/0462C08J2205/044C08J2371/08C08J2379/08C08J2381/04C08J2381/06Y02E60/10H01M50/403H01M50/417H01M50/457H01M50/491H01M50/443H01M50/42H01M50/426H01M50/423H01M50/46H01M50/449H01M50/463C08J3/24Y02P70/50
Inventor 庾亨均金锡九柳宝炅金钟勋
Owner LG CHEM LTD
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