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

Provided are a separator for a rechargeable lithium battery and a rechargeable lithium battery including same, the separator for a rechargeable lithium battery comprising: a porous substrate; a coating layer positioned on at least one surface of the porous substrate and comprising polyethylene particles and a first ceramic at a weight ratio of 6:4 to 8:2; and an adhesive layer positioned on one surface of the coating layer and comprising a second ceramic and a binder at a weight ratio of 7:3 to 5:5, wherein the binder comprises polyvinylidene fluoride and a polyvinylidene-hexapropylene copolymer at a weight ratio of 6:4 to 4:6, and the first ceramic and the second ceramic have different average sizes. L'invention concerne un séparateur pour batterie au lithium rechargeable et une batterie au lithium rechargeable le comprenant, le séparateur pour batterie au lithium rechargeable comprenant : un substrat poreux ; une couche de revêtement positionnée sur au moins une surface du substrat poreux et comprenant des particules de polyéthylène et une première céramique selon un rapport pondéral de 6:4 à 8:2 ; et une couche adhésive positionnée sur une surface de la couche de revêtement et comprenant une seconde céramique et un liant à un rapport pondéral de 7:3 à 5:5, le liant comprenant du fluorure de polyvinylidène et un copolymère de polyvinylidène-hexapropylène à un rapport pondéral de 6:4 à 4:6, et la première céramique et la seconde céramique ayant des tailles moyennes différentes. 리튬 이차 전지용 세퍼레이터 및 이를 포함하는 리튬 이차 전지를 제공하며, 상기 리튬 이차 전지용 세퍼레이터는 다공성 기재, 상기 다공성 기재의 적어도 일면에 위치하고, 폴리에틸렌 입자와 제1 세라믹을 6:4 내지 8:2 중량비로 포함하는 코팅층, 및 상기 코팅층의 일면에 위치하는 제2 세라믹 및 바인더를 7:3 내지 5:5 중량비로 포함하는 접착층을 포함하고, 상기 바인더는 폴리비닐리덴 플루오라이드 및 폴리비닐리덴-헥사프로필렌 공중합체를 6:4 내지 4:6 중량비를 포함하고, 상기 제1 세라믹 및 상기 제2 세라믹의 평균 크기가 상이한 것이다.