Positive electrode active material for nonaqueous electrolyte secondary battery
US10218000B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2015 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Feb 13, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A positive electrode active material for nonaqueous electrolyte secondary batteries is provided with which increased DCR after cycling can be controlled. A positive electrode active material according to an aspect of the present invention is secondary particles of a lithium transition metal oxide formed through the aggregation of primary particles of the oxide, the lithium transition metal oxide containing at least Ni. Secondary particles of a rare earth compound formed through the aggregation of particles of the rare earth compound are adhering to depressions each created between adjacent two of the primary particles on the surfaces of the secondary particles. The secondary particles of the rare earth compound are adhering to both of the two adjacent primary particles at the depressions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.