Lithium ion secondary battery and electric device using same
US11289706B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 11, 2017 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Oct 3, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium ion secondary battery includes a positive electrode having a positive electrode active material layer on a current collector, a negative electrode having a negative electrode active material layer on a current collector, and a separator disposed between the positive electrode and the negative electrode and impregnated with a non-aqueous electrolyte solution. The positive electrode active material layer contains a positive electrode active material and a binder, the negative electrode active material layer contains a negative electrode active material and a binder, the binder of the negative electrode active material layer contains a copolymer of vinyl alcohol and an alkali metal neutralized product of ethylenically unsaturated carboxylic acid, and the separator includes a polymeric base material containing an inorganic compound or includes a polymer having a melting point or glass transition temperature of 140° C. or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.