Titles:
Polyolefin microporous membrane and lithium ion secondary battery using the same
ポリオレフィン微多孔膜及びこれを用いたリチウムイオン二次電池
Abstracts:
The object of the present invention is to provide a microporous polyolefin membrane which can effectively suppress thermal runaway at an abnormal temperature rise and can provide a highly safe separator. A polyolefin microporous membrane having a laminated structure comprising an A layer containing polyolefin and at least one B layer containing polyolefin on both sides thereof. The polypropylene contained in the layer A is 0% by mass or more and less than 3% by mass, and the polypropylene contained in the layer B is 1% by mass or more and less than 30% by mass. The ratio of the thickness of the layer A to the total thickness of the porous film is 40% to 90%, and the content of inorganic particles in the layer B is less than 5% by mass. In a 200 ° C. solder test in which a soldering iron is pierced and held for 3 seconds and removed, a hole and a discolored portion are formed in the microporous polyolefin film, and the hole area is 2.00 mm 2 or more and 6.00 mm 2 or less, and the above hole The ratio of the hole area to the total area of the discolored parts relative to the area is 1.00 or more and 2.20 or less. [Selected figure] Figure 1
Titles:
POROUS SEPARATING FILM AND ELECTROCHEMICAL DEVICE CONTAINING THE SAME
다공성 분리막 및 이를 포함하는 전기화학소자
Abstracts:
A plurality of inorganic particles, and a binder polymer disposed on at least a part of the surface of the inorganic particles to connect and fix the inorganic particles, wherein the binder polymer has a weight average molecular weight of 1,200,000 g / mol to 1,600,000 g / mol , And the weight of the binder polymer relative to the total weight of the porous separator is 17 to 25 wt%, and an electrochemical device including the porous separator.
다수의 무기물 입자, 및 상기 무기물 입자의 표면의 일부 또는 전부에 위치하여 상기 무기물 입자 사이를 연결 및 고정시키는 바인더 고분자를 포함하고, 상기 바인더 고분자의 중량평균분자량이 1,200,000g/mol 내지 1,600,000g/mol 이고, 상기 다공성 분리막의 전체 중량에 대한 바인더 고분자의 중량이 17 내지 25 중량%인 다공성 분리막 및 이를 포함하는 전기화학 소자가 제시된다.
