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1. WO2022005211 - SEPARATOR FOR LITHIUM SECONDARY BATTERY, MANUFACTURING METHOD THEREFOR, AND SEPARATOR MANUFACTURED BY SAME

Publication Number WO/2022/005211
Publication Date 06.01.2022
International Application No. PCT/KR2021/008297
International Filing Date 30.06.2021
IPC
H01M 50/449 2021.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
409Separators, membranes or diaphragms characterised by the material
449having a layered structure
H01M 50/446 2021.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
409Separators, membranes or diaphragms characterised by the material
446Composite material consisting of a mixture of organic and inorganic materials
H01M 50/46 2021.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
46Separators, membranes or diaphragms characterised by their combination with electrodes
H01M 50/403 2021.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
403Manufacturing processes of separators, membranes or diaphragms
H01M 10/052 2010.1
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
CPC
H01M 10/052
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
H01M 50/403
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
403Manufacturing processes of separators, membranes or diaphragms
H01M 50/446
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
409Separators, membranes or diaphragms characterised by the material
446Composite material consisting of a mixture of organic and inorganic materials
H01M 50/449
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
409Separators, membranes or diaphragms characterised by the material
449having a layered structure
H01M 50/46
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
46Separators, membranes or diaphragms characterised by their combination with electrodes
Applicants
  • 주식회사 엘지에너지솔루션 LG ENERGY SOLUTION, LTD. [KR]/[KR]
Inventors
  • 한다경 HAN, Da-Kyung
  • 정소미 JEONG, So-Mi
  • 권경안 KWON, Kyung-An
  • 김민지 KIM, Min-Ji
Agents
  • 특허법인 필앤온지 PHIL & ONZI INT'L PATENT & LAW FIRM
Priority Data
10-2020-008060430.06.2020KR
Publication Language Korean (ko)
Filing Language Korean (KO)
Designated States
Title
(EN) SEPARATOR FOR LITHIUM SECONDARY BATTERY, MANUFACTURING METHOD THEREFOR, AND SEPARATOR MANUFACTURED BY SAME
(FR) SÉPARATEUR POUR BATTERIE SECONDAIRE AU LITHIUM, SON PROCÉDÉ DE FABRICATION ET SÉPARATEUR FABRIQUÉ PAR CELUI-CI
(KO) 리튬 이차 전지용 분리막 및 이의 제조방법 및 이에 의해 제조된 분리막
Abstract
(EN) The present invention relates to a separator for a lithium secondary battery, and a manufacturing method therefor, and is particularly characterized by having: a porous polymer substrate; and a porous coating layer which is formed on at least one surface of the porous polymer substrate, and comprises inorganic particles, a fluorine-based binder polymer (A), and an ethylene-based copolymer (B) having an ethylene-monomer-derived repeat unit (a) and a vinyl-acetate-monomer-derived repeat unit (b). By using the ethylene-based copolymer having preset characteristics, the present invention can provide a separator and a manufacturing method therefor, which simultaneously improve the adhesive force (peel strength) between the porous coating layer and the porous polymer substrate, and the adhesive force (lamination strength) between the separator and an electrode.
(FR) La présente invention concerne un séparateur pour une batterie secondaire au lithium et son procédé de fabrication, et est particulièrement caractérisée en ce qu'elle comprend : un substrat polymère poreux ; et une couche de revêtement poreux qui est formée sur au moins une surface du substrat polymère poreux, et comprend des particules inorganiques, un polymère liant à base de fluor (A) et un copolymère à base d'éthylène (B) ayant une unité de répétition dérivée de monomère d'éthylène (a) et une unité de répétition dérivée de monomère d'acétate de vinyle (b). En utilisant le copolymère à base d'éthylène ayant des caractéristiques prédéfinies, la présente invention permet de fournir un séparateur et son procédé de fabrication qui améliorent simultanément la force adhésive (résistance au pelage) entre la couche de revêtement poreux et le substrat polymère poreux ainsi que la force adhésive (force de stratification) entre le séparateur et une électrode.
(KO) 본 발명은 리튬 이차 전지용 분리막 및 이의 제조방법에 관한 것으로서, 구체적으로, 다공성 고분자 기재; 및 상기 다공성 고분자 기재의 적어도 일측 표면에 형성되며, 무기물 입자, 불소계 바인더 고분자(A) 및 에틸렌 단량체 유래 반복단위 (a)와 비닐 아세테이트 단량체 유래 반복단위 (b)를 구비한 에틸렌계 공중합체(B)를 포함하는 다공성 코팅층;을 구비하는 것을 특징으로 하는 것이다. 또한, 소정 특성을 가지는 에틸렌계 공중합체를 사용함으로써, 다공성 코팅층과 다공성 고분자 기재 사이의 접착력(Peel Strength)와 분리막과 전극과의 접착력(Lami Strength)를 동시에 개선시킨 분리막 및 이의 제조방법을 제공할 수 있다.
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