Positive electrode plate for nonaqueous electrolyte secondary battery, method for manufacturing the positive electrode plate, nonaqueous electrolyte secondary battery, and method for manufacturing the battery
US9231245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2012 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Aug 10, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A positive electrode plate for a nonaqueous electrolyte secondary battery, the positive electrode plate including: a positive electrode substrate; a positive electrode active material layer formed on the positive electrode substrate; and a positive electrode substrate exposed portion on which the positive electrode active material layer is not formed, the positive electrode substrate exposed portion having a region that is adjacent to the positive electrode active material layer and has a protective layer formed thereon, the positive electrode active material layer and the protective layer containing polyvinylidene fluoride, and the weight average molecular weight Mw of the polyvinylidene fluoride contained in the protective layer being larger than the weight average molecular weight Mw of the polyvinylidene fluoride contained in the positive electrode active material layer. Thus, a high reliable nonaqueous electrolyte secondary battery where the widths of the positive electrode material and the protective layers are stable can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.