NONAQUEOUS ELECTROLYTE SECONDARY BATTERY SEPARATOR

Provided is a non-aqueous electrolyte secondary battery separator with a small difference in air permeability before and after the application of pressure. In the non-aqueous electrolyte secondary battery separator, an average of a crease resistance rate per weight per unit area in TD and a crease r...

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Bibliographic Details
Main Author AZUMA YUICHIRO
Format Patent
LanguageEnglish
Korean
Published 24.10.2018
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:Provided is a non-aqueous electrolyte secondary battery separator with a small difference in air permeability before and after the application of pressure. In the non-aqueous electrolyte secondary battery separator, an average of a crease resistance rate per weight per unit area in TD and a crease resistance rate per weight per unit area in MD is not less than 5.0% and a difference between the crease resistance rate per weight per unit area in the TD and the crease resistance rate per weight per unit area in the MD is not more than 3.5% in a polyolefin porous film. 가압 전후의 투기도 차가 작은 비수 전해액 이차 전지용 세퍼레이터를 제공한다. 비수 전해액 이차 전지용 세퍼레이터는, 폴리올레핀 다공질 필름의, TD의 단위 면적당 중량당의 주름 방지율과 MD의 단위 면적당 중량당의 주름 방지율의 평균이 5.0％ 이상이고, 또한 TD의 단위 면적당 중량당의 주름 방지율과 MD의 단위 면적당 중량당의 주름 방지율의 차가 3.5％ 이하이다.
Bibliography:Application Number: KR20180122381