Separator for electrochemical device and electrochemical device containing same
US11769929B2 · kind B2 · utility
2Cited by
1References
12Claims
0Family size
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Key dates
| Filing date | Nov 4, 2019 |
| Grant date | Sep 26, 2023 |
| Priority date | — |
| Expiry date | May 3, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A separator that includes a porous polymer substrate, a first porous coating layer and a second porous coating layer. First inorganic particles contained in the first porous coating layer have a lower hardness as compared to the second inorganic particles contained in the second porous coating layer. Since the separator is provided with at least two porous coating layers including inorganic particles having a different hardnesses, it is possible to increase the dielectric breakdown voltage, and thus to provide a battery with improved safety. It is also possible to reduce deformation of the separator caused by heat or pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.