Separator film for batteries including oxidation resistant vinyl alcohol copolymer
US9142835B2 · kind B2 · utility
5Cited by
12References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2008 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Nov 21, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A separator film for an electric battery is provided to substantially eliminate electric contact between an anode component and a cathode component. The film includes a vinyl alcohol copolymer with functional comonomer units such as sulfonic acid functionalized units or salts thereof. The films are desirable for use in battery separators because they exhibit superior resistance to degeneration by oxidation, enabling the manufacture of batteries with improved conductivity, longer discharge times, and longer cycle lives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.