Lg Energy Solution, Ltd.

Lg Chem, Ltd

Sk Innovation Co., Ltd.

Sk Ie Technology Co., Ltd.

Je An Lee

Kwan Woo Nam

Min Ji Kim

Young Bok Kim

Chul Haeng Lee

Seung Hyun Lee

Da Kyung Han

Jung Hoon Lee

Sol Ji Park

Kyung Ryun Ka

Sang Joon Lee

Kyung Ho Ahn

Hyeon Sik Choi

Kyoung Ho Ahn

Houng Sik Yoo

Su Jin Park

Dong Jin Joo

Jung Moon Sung

Gye Min Kwon

Jang Weon Rhee

Yong Kyoung Kim

Su Jin Yoon

Dong Wook Sung

In Hyouk Sung

Hye Jin Kwon

Min Ji Gu

Chan Jong Kim

Young Duk Kim

A separator having a polyolefin substrate, first coating layer including first inorganic particles on at least one surface of the polyolefin substrate and a second coating layer including second inorganic particles on a surface of the first coating layer opposite the polyolefin substrate. An average particle size of the first inorganic material particles of the first coating layer is greater than an average particle size of the second inorganic material particles of the second coating layer. The first inorganic particles of the first coating layer are 900 nm or more based on D50, and the second inorganic particles of the second coating layer are 10 nm or more and 500 nm or less based on D50.

Separator comprising dual coating layers and secondary battery comprising the same

Disclosed herein is a separator for electrochemical devices, configured to guarantee electrical insulation between a positive electrode and a negative electrode, wherein the separator includes no polyolefin substrate, and includes inorganic particles, a binder for coupling between the inorganic particles, and a crosslinking agent.

Separator having no separator substrate and electrochemical device including the same

A separator for a secondary battery having a separator substrate and a coating layer formed on the separator substrate. The coating layer is on at least one surface of the separator substrate. The coating layer comprises an acrylate-based binder and an additive. The additive is a fluorine-based non-ionic surfactant, and provides a separator for a secondary battery with significantly improved electrolyte impregnation rate.

Separator for secondary battery having excellent electrolyte impregnation

A method for improving physical properties of a separator in which is capable of increasing insulation, tensile strength and elongation. The separator also has improved physical properties through the above method. Particularly, the present invention is applied to a separator that has already manufactured. After forming a double bond in the separator that has already manufactured, crosslinking may be formed through the double bond or by adding a separate crosslinking initiator.

Method for improving physical properties of separator by post-treatment crosslinking and separator prepared thereby

Disclosed herein is a porous separator for electrochemical devices, configured to guarantee electrical insulation between a positive electrode and a negative electrode, wherein the porous separator includes no polyolefin substrate, and includes inorganic particles, a binder for coupling between the inorganic particles, and a crosslinking agent.

Porous separator without polyolefin substrate including inorganic particles and polymer binder

Disclosed herein is a separator for secondary batteries, configured to provide insulation between a positive electrode and a negative electrode, wherein the separator comprises no polyolefin substrate, is configured to have a layer structure comprising a fibrous support, inorganic particles, and a binder, and has improved dimensional stability.

Separator for secondary batteries having no separator substrate

A flame retardant separator for secondary batteries, and more particularly, a flame retardant separator for secondary batteries comprising or coated with a metal hydroxide having a low Gibbs free energy among polymorphs of a metal hydroxide used as an inorganic flame retardant.

Flame retardant separator for secondary battery

A slurry composition for coating a secondary battery separator, a separator prepared using the same, and a secondary battery including the separator, wherein the slurry composition includes a phenolic compound including two or more aromatic rings, inorganic particles, a binder, and a solvent.

Slurry composition for coating secondary battery separator and secondary battery separator prepared using same

A separator for secondary batteries that allows the amount of a dispersing resin that is used and the amount of a dispersant that is used to be reduced in order to prevent an increase in resistance after the separator is coated, which occurs in the case in which a large amount of the dispersing resin is used in order to disperse inorganic matter, and an electrochemical device having the same applied thereto. The amount of a dispersing resin is reduced, whereby it is possible to prevent an increase in resistance after a porous separator is coated, a dispersing resin having a specific weight average molecular weight is mixed, whereby physical properties and dispersivity are improved, and the use of an expensive dispersant is excluded, whereby processing costs are reduced.

Separator including porous polymer substrate, porous coating layer, and resin layer and electrochemical device having the same applied thereto

A flame retardant separator for secondary batteries having an asymmetric structure, and more particularly, a flame retardant separator for secondary batteries having an asymmetric structure in which a hydroxide-based inorganic flame retardant is coated on only a surface facing a positive electrode. The present invention provides a separator, which is capable of preventing the risk of lithium ions predominantly precipitated from a negative electrode in a lithium secondary battery, enhancing the flame retardant effect, and maintaining electrochemical properties in contrast with a conventional separator coated with inorganic matters, and a lithium secondary battery including the same.

Flame retardant separator having asymmetric structure for secondary batteries

A functional binder and a separator including the functional binder, in which the separator includes a porous polyolefin substrate and an organic-inorganic hybrid porous coating layer formed on at least one surface of the substrate and configured to include a mixture of inorganic particles and a binder compound, thus increasing binder-inorganic material adhesion and substrate-binder adhesion while preventing internal shorting from occurring by performing self-healing of damage to the separator, enhancing the adhesion of the separator to a cathode and an anode, and withstanding the dissolution of a transition metal of a cathode material. The binder contains 10 wt % or more of a hydroxyl group per molecule thereof.

Battery separator including functional binder and electrochemical device comprising the same

A separator including a polyolefin-based separator substrate having a porous structure, a first coating portion including a mixture of inorganic particles and a binder polymer, and a second coating portion including a material that reduces generation of hydrofluoric acid, wherein the first coating portion and the second coating portion are located on the separator substrate, are located in pores in the separator substrate, or are located on the separator substrate and in pores in the separator substrate.

Battery separator comprising hydrofluoric acid reduction material

Disclosed is a microporous composite film having a coating layer formed on at least one surface of a microporous polyolefin film, wherein the coating layer simultaneously includes a high thermostable polymer resin and inorganic particles. More specifically, the present invention relates to a microporous composite film in which an area shrinkage at 170&#xb0; C. for 1 hr is 10% or less; a tensile modulus in each of a machine direction and a transverse direction at 130&#xb0; C. is 0.5 MPa to 7.0 MPa; a ratio between permeability of a microporous composite film (CCS) and permeability of a microporous polyolefin film (S) is 1.1&#x2266;CCS/S&#x2266;3.5; and a permeability of the microporous composite film is 450 sec or less.

Growing community of inventors

Daejeon, South Korea

Je An Lee