Lithium secondary battery
US7682744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2005 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Jul 24, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium secondary battery having high capacity and good charge-discharge cycle performance is provided. The lithium secondary battery includes a negative electrode (2) containing silicon as a negative electrode active material, a positive electrode (1) containing a positive electrode active material, and a non-aqueous electrolyte. The positive electrode active material is a lithium-transition metal composite oxide including a layered structure represented by the chemical formula LiaNixMnyCozO2, where a, x, y, and z satisfy the expressions: 0≦a≦1.3, x+y+z=1, 0<x, 0≦y≦0.5, and 0≦z.), and the theoretical electrical capacity ratio of the positive electrode to the negative electrode (positive electrode/negative electrode) is 1.2 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.