Negative electrode for lithium secondary cell and lithium secondary cell
US8216720B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2003 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Sep 15, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode for a lithium secondary cell having a collector composed of an electroconductive metal foil and, provided on the surface thereof, an active material layer containing active material particles containing silicon and/or a silicon alloy and a binder, characterized in that the binder has mechanical characteristics of a tensile strength of 50 N/mm2 or more, an elongation at break of 10% or more, a strain energy density of 2.5×10−3 J/mm3 or more and a coefficient of elasticity of 10000 N/mm2 or less, and preferably characterized in that the collector has mechanical characteristics of a tensile strength of 80 N/mm2 or more, a proportional limit 30 N/mm2 or more, an elongation at break of 1.0% or more and an elastic elongation limit of 0.03% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.