Titles:
Lithium secondary battery separator with improved pressure-resistance and Lithium secondary battery comprising the separator
개선된 내압축성을 갖는 리튬이차전지용 분리막 및 상기 분리막을 포함하는 리튬이차전지
Abstracts:
A separator for a lithium secondary battery comprising a polyolefin porous film, wherein the polyolefin porous film has a 2 theta (theta, θ) peak in the range of 15 to 25 degrees (°) when measured by WAXS (Wide-angle X-ray scattering), A separator for a lithium secondary battery, characterized in that the 2theta peak includes a (110) peak, and the crystals constituting the polyolefin porous film have an orientation degree in the range of 0.60 to 0.95 based on the (110) peak, and lithium containing the same A secondary battery is presented.
폴리올레핀 다공성 필름을 포함하는 리튬이차전지용 분리막으로서, 상기 폴리올레핀 다공성 필름이 WAXS (Wide-angle X-ray scattering) 측정시 15 내지 25 도(°) 범위에서 2쎄타(theta, θ) 피크를 갖고, 상기 2쎄타 피크가 (110) 피크를 포함하며, 상기 폴리올레핀 다공성 필름을 구성하는 결정이 (110) 피크를 기준으로 0.60 내지 0.95 범위의 배향도를 가지는 것을 특징으로 하는 리튬이차전지용 분리막, 및 이를 포함하는 리튬이차전지가 제시된다.
Applicant:
LG CHEMICAL LTD [KR] (주식회사 엘지화학)
Inventors:
LEE JOO SUNG (이주성)
RYU BI OH (유비오)
LEE SANG JOON (이상준)
HAN SUNG JAE (한성재)
MUN SUNG CIK (문성식)
BAE WON SIK (배원식)
PROBLEM TO BE SOLVED: To provide a microporous membrane excellent in a half cell initial overcharge test result, and a separator or an electrochemical device for an electrochemical device containing the microporous membrane. SOLUTION: This is a microporous film containing a polyolefin resin as a main component, and the total pore volume (pore diameter 98 nm or less) of the one-point method measured by a nitrogen gas adsorption test is 25% or more of the total pore volume, 85. A microporous film having a porous layer of% or less is provided. [Selection diagram] None
Title:
METHOD FOR PREPARING COMPOSITE SEPARATOR, COMPOSITE SEPARATOR, AND LITHIUM BATTERY COMPRISING COMPOSITE SEPARATOR
Abstract:
A method of preparing a composite separator for a lithium battery includes: coating a binder composition on one side or both sides of a porous substrate; hot-air drying the porous substrate coated with the binder composition; and supplying a non-solvent during the hot-air drying, such that a porous layer is on one side or both sides of the porous substrate, wherein the binder composition includes a good-solvent, a binder, and inorganic particles, an amount of the non-solvent supplied during the hot-air drying is from 12 g/m3 to 17 g/m3, and a ratio (e) of the hot-air supply speed to the moving speed of the porous substrate per unit transit time in the hot-air dryer is from 2.2 to 5.0.
Applicant:
SAMSUNG SDI CO LTD [KR]
Inventor:
HONG DAEHYUN [KR]
Other family members:
KR 20210113877 A,
Pub. Date: 2021-09-17,
EPO/ Google
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