Positive electrode and nonaqueous electrolyte secondary battery
US7585592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2006 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Feb 28, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A positive electrode for a secondary battery and a secondary battery. A mixture of at least a lithium metal oxide with a hexagonal crystal structure (belonging to the R3m space group) containing nickel (Ni) and a lithium manganese oxide with a rhombic crystal structure (belonging to the Pmmn space group) is used for the positive electrode active material. Furthermore, it is preferable for the lithium metal oxide described above to include manganese (Mn) and more preferable for cobalt (Co) to be included to improve the stability of the crystal structure. In addition, it is preferable for the proportion of the lithium manganese oxide in the mixture described above to be from 20% by weight to 80% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.