Battery separator substrate including dense layer formed on support layer, and method for preparing the same
US11616272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2020 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | Apr 10, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium ion battery separator substrate, a preparation method and application thereof are provided. The substrate comprises a support layer and a dense layer, wherein the support layer comprises superfine main fibers, thermoplastic bonded fibers and the nanofibers, and the dense layer comprises nanofibers. The substrate has excellent high-temperature resistance performance, the substrate still has certain strength after being processed at 300° C. for 1 h, and the heat shrinkage rate is less than 5.0%; the substrate has a uniform and compact double-layer structure without a pinhole. Therefore, the requirements concerning heat resistance, porosity and strength of the substrate are met.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.