SEPARATOR FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME

• Main Authors: SEO, Dongwan, KIM, Jinyoung, CHOI, Hyeonseon
• Format: Patent
• Language: English; French; Korean
• Published: 19.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A separator for a rechargeable lithium battery and a rechargeable lithium battery including same are provided, and the separator for a rechargeable lithium battery comprises: a porous substrate; and a coating layer disposed on at least one surface of the porous substrate and comprising polyethylene particles and ceramics, wherein the content of the polyethylene particles is 40 to 65 % by weight of the content of the porous substrate, the weight-average molecular weight (Mw) of the polyethylene particles ranges from 1000 to 3000g/mol, and the mixing ratio (ratio by weight) of the polyethylene particles to the ceramics ranges from 95: 5 to 80:20. L'invention concerne un séparateur pour une batterie au lithium rechargeable et une batterie au lithium rechargeable le comprenant, et le séparateur pour une batterie au lithium rechargeable comprend : un substrat poreux ; et une couche de revêtement disposée sur au moins une surface du substrat poreux et comprenant des particules de polyéthylène et des céramiques, la teneur des particules de polyéthylène étant de 40 à 65 % en poids de la teneur du substrat poreux, le poids moléculaire moyen en poids (Mw) des particules de polyéthylène étant compris entre 1 000 et 3 000 g/mol, et le rapport de mélange (rapport en poids) des particules de polyéthylène aux céramiques étant compris entre 95:5 et 80:20. 리튬 이차 전지용 세퍼레이터 및 이를 포함하는 리튬 이차 전지를 제공하며, 상기 리튬 이차 전지용 세퍼레이터는 다공성 기재 및 상기 다공성 기재의 적어도 일면에 위치하고, 폴리에틸렌 입자와 세라믹을 포함하는 코팅층을 포함하고, 상기 폴리에틸렌 입자의 함량은 상기 다공성 기재 함량의 40 중량% 내지 65 중량%이고, 상기 폴리에틸렌 입자의 중량평균분자량(Mw)은 1000g/mol 내지 3000g/mol이고, 상기 폴리에틸렌 입자와 세라믹의 혼합비가 95: 5 내지 80 : 20 무게비이다.