Grafted microporous separator for electrochemical generator and a process for its production
US5578400A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1996 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Feb 12, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A separator for an electrochemical generator is constituted by a microporous polyolefin film grafted with at least one monomer selected from diethyleneglycol dimethacrylate, furfuryl acrylate and a diethyleneglycol dimethacrylate/acrylic acid mixture. In a process for the production of a separator of this kind grafting of the monomer is carried out in three stages: irradiation of the film, if required, storage of the irradiated film, immersion of the irradiated film in the grafting solution comprising the monomer, a solvent, and at least one additive. The separator may be used in an electrochemical generator with either an aqueous or nonaqueous electrolyte where the salt concentration is between 1M and 2M.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.