Separator for secondary cell having excellent heat resistance and shutdown properties
US11139542B2 · kind B2 · utility
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Key dates
| Filing date | Aug 26, 2019 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Feb 3, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2200/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A separator for a secondary cell includes a porous polymer substrate having a first surface, a second surface opposing the first surface, and a plurality of pores connecting the first surface to the second surface; and heat-resistant coating layers formed on at least one of the first surface and the second surface of the porous polymer substrate and on internal surfaces of the pores using an atomic layer deposition process (ALD). Pores having a non-coated region are present in the internal surfaces of the pores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.