Separator for lithium secondary battery and lithium secondary battery comprising same
US12322830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2019 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Aug 1, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a separator for a lithium secondary battery and a lithium secondary battery including same, the separator including: a porous substrate; and a coating layer on at least one surface of the porous substrate. The coating layer includes a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, a second structural unit derived from (meth)acrylonitrile, and a third structural unit derived from (meth)acrylamido sulfonic acid, (meth)acrylamido sulfonic acid salt, or a combination thereof. The first structural unit is included in an amount of 55 mol % to 90 mol % based on 100 mol % of the (meth)acrylic copolymer and the second structural unit and third structural unit are each independently included in 5 mol % to 40 mol % based on 100 mol % of the (meth)acrylic copolymer. The (meth)acrylic copolymer has a weight average molecular weight of 200,000 to 700,000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.