Composite separation membrane for lithium secondary battery and manufacturing method therefor
US10985356B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 1, 2016 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Sep 17, 2036 |
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 composite separation membrane for a lithium secondary battery, having an excellent effect of improving the life time and safety of a battery and a lithium secondary battery including the membrane. The composite separation membrane includes a porous base layer; a heat-resistant layer formed on one side or both sides of the porous base layer; and a fusion layer formed on an outermost layer. The heat-resistant layer includes inorganic particles connected and fixed by binder polymers, and the fusion layer includes crystalline polymers in the form of particles having a melting temperature of 100° C. or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.