Separation membrane comprising coating layer, method of preparing same, and battery using same
US11814483B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2020 |
| Grant date | Nov 14, 2023 |
| Priority date | — |
| Expiry date | Aug 24, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is a high thermal resistant polyolefin-based separator including a coating layer containing polyamic acid.Specifically, the separator includes a polyolefin-based substrate film, and a coating layer containing polyamic acid formed on one or both surfaces of the polyolefin-based substrate film, wherein the polyamic acid contains one or more functional groups selected from the group consisting of a sulfone group, a trifluoromethyl group, an alkyl group, and a phenyl ether group.Also, disclosed herein is an electrochemical battery having improved thermal stability by using the separator including a coating layer containing polyamic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.