Separator for lithium secondary battery and lithium secondary battery comprising same
US12212017B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2019 |
| Grant date | Jan 28, 2025 |
| Priority date | — |
| Expiry date | May 31, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are a separator for a lithium secondary battery and a lithium secondary battery comprising same. The separator for a lithium secondary battery comprises: a porous substrate; and a coating layer disposed on at least one side of the porous substrate, wherein the coating layer contains heat-resistant organic particles, an organic heat-resistant binder, and an organic adhesive binder, wherein the heat-resistant organic particles have a thermal decomposition temperature of 150° C. or higher and a particle diameter of 100 nm to 300 nm, the organic heat-resistant binder is a first organic material having a glass transition temperature of 130° C. to 200° C., the organic adhesive binder is a second organic material having a glass transition temperature of −40° C. or lower, and the mixing weight ratio of the organic heat-resistant binder and the organic adhesive binder is 7:3 to 9:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.