Lithium ion secondary battery with improved electrode stability and safety
US8236449B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2006 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Jun 26, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium ion secondary battery is provided including a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes active material particles. The active material particles include secondary particles of a lithium composite oxide, and some of the secondary particles have a crack. At least a surface layer portion of the active material particles includes element Me of at least one selected from the group consisting of Mn, Al, Mg, Ca, Zr, B, W, Nb, Ta, In, Mo, and Sn. Element Me is distributed more in the surface layer portion compared with an inner portion of the active material particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.