Polyolefin microporous membrane, separator for non-aqueous secondary battery, non-aqueous secondary battery and method of producing polyolefin microporous membrane
US9680142B2 · kind B2 · utility
1Cited by
3References
12Claims
0Family size
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Key dates
| Filing date | Mar 23, 2011 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Jan 15, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polyolefin microporous membrane, the membrane having, when measured by DSC, a degree of crystallinity of from 65 to 85%, a lamellar crystal/crystal ratio of from 30 to 85%, a crystal length of from 5 nm to 50 nm and an amorphous length of from 3 nm to 30 nm, and a polyolefin microporous membrane, the membrane having, when measured by X-ray diffractometry, crystal size of from 12.5 nm to 13.5 nm and a degree of crystallinity of from 64 to 68%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.