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US 2026/0280055 A1Published application
Separator, preparation method thereof and electrochemical device including the same
AssigneeLG Energy Solution, Ltd.
InventorsWon-Sik BAE, Byeong-Chan Bak, Kyeong-Hui Bai, So-Yeong Lee, In-Young Choi
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Abstract
A separator according to an aspect of the present disclosure includes a polyolefin-based substrate having a thickness of about 8 μm or less. The polyolefin-based substrate has a maximum pore size of about 150 nm or less.
Claims16
A separator comprising:
- a polyolefin-based substrate having a thickness of about 8 μm or less,
- wherein the polyolefin-based substrate has a maximum pore size of about 150 nm or less.
A separator manufacturing method comprising:
- obtaining a polymer sheet by extruding, cooling, and molding a polyolefin resin raw material;
- stretching the obtained polymer sheet in MD and TD;
- and
- obtaining a polyolefin-based substrate by heat-setting the stretched polymer sheet,
- wherein the heat-setting is performed at a temperature higher than the MD and TD stretching temperatures, and
- the polyolefin-based substrate has a thickness of about 8 μm or less.
3 more elements
Dependencies are inferred from the claim text.