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Porous separator coated with organic/inorganic complex using aqueous coating solution, method for manufacturing same, and electrochemical device using same

A porous separator and complex technology, which is applied in the field of electrochemical devices and porous separators, can solve the problems of easy separation of inorganic particles, difficulty in improving processing speed, and increasing product defect rate

Active Publication Date: 2015-01-07
HANWHA TOTAL PETROCHEMICAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the surface of the coating becomes sticky, dust or unwanted particles from the outside may adhere thereto and cause Can increase the defect rate of the product
Second, if the concentration of the binder in the slurry is high, the viscosity of the slurry is highly increased, which makes it difficult to prepare the organic / inorganic complex layer of the film
Third, if the low viscosity of the slurry is maintained, the bonding strength between the inorganic particles and the porous substrate or between the inorganic particles decreases, and thus, the inorganic particles are easily separated
Fourth, in the organic solvent-based method, the drying zone of the drying line is elongated due to the critical explosion limit in drying, and thus it is difficult to improve the processing speed
Further, since heat treatment and UV treatment need to require a long time even during the drying process, the productivity may be very limited, and the porous substrate may be damaged due to the high temperature / high energy during the drying process, which may damage the film. Can cause separator performance and air permeability to deteriorate

Method used

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  • Porous separator coated with organic/inorganic complex using aqueous coating solution, method for manufacturing same, and electrochemical device using same
  • Porous separator coated with organic/inorganic complex using aqueous coating solution, method for manufacturing same, and electrochemical device using same
  • Porous separator coated with organic/inorganic complex using aqueous coating solution, method for manufacturing same, and electrochemical device using same

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Embodiment Construction

[0021] In the organic / inorganic complex-coated porous separator of the present invention, an aqueous coating solution in which inorganic particles and a polymer binder are dispersed in water is coated on at least one surface selected from the porous substrate and the porous substrate. on at least one area of ​​at least a portion of the porous portion.

[0022]In the present invention, the porous substrate may use any porous substrate commonly used in electrochemical devices, such as lithium secondary batteries, and may include, for example, a thin film formed using one or more selected from the following or non- Woven fabrics: HDPE, LDPE, LLDPE, UHMWPE, PP, PET, PBT, POLYESTER, POLYESTER Acetal, polyamide, polycarbonate, polyimide, polyetheretherketone, polyethersulfone, polyphenylene ether, polyphenylene sulfide, polyethylene naphthalate, and the like.

[0023] Surface treatment techniques, such as corona, plasma, or high-energy radiation treatment, can be used to treat the ...

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Abstract

The present invention relates to a separator used in an electrochemical device, and more particularly, to a porous separator obtained by applying an organic / inorganic complex coating layer on a porous substrate, to a method for manufacturing same, and to an electrochemical device using same.

Description

[technical field] [0001] The present invention relates to a separator used in an electrochemical device, and more particularly, a porous separator in which an organic / inorganic complex coating is applied to a porous substrate, a production method thereof, and an electrochemical device using the same. [Background technique] [0002] A lithium-ion secondary battery pack is an energy storage device with high energy density, which can be charged and discharged through reversible conversion between chemical energy and electrical energy, and is basically composed of an anode, a cathode, a separator, and an electrolyte. It is widely used in small-sized electronic devices such as mobile phones, notebook computers and the like. [0003] In recent years, in response to environmental concerns, high oil prices, and energy efficiency and storage, the adoption of lithium-ion battery packs has rapidly expanded to hybrid electric vehicles (HEVs), plug-in electric vehicles (plug-in EVs), ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/05H01M50/403H01M50/417H01M50/42H01M50/423H01M50/429H01M50/434H01M50/443H01M50/451H01M50/457H01M50/489H01M50/491H01M50/494H01M50/497
CPCH01M2/1686H01M2/1653H01M2/166H01M10/05H01M50/497H01M50/423H01M50/489H01M50/417H01M50/494H01M50/434H01M50/451H01M50/443H01M50/491H01M50/42H01M50/429H01M50/457H01M50/403H01M10/052Y02E60/10H01M50/446H01M50/44
Inventor 刘珍雅玄在镕李度勋崔昶铉
Owner HANWHA TOTAL PETROCHEMICAL CO LTD
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