Positive electrode active material for nonaqueous electrolyte secondary battery
US10193153B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2015 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Jul 14, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided a positive electrode active material for a nonaqueous electrolyte secondary battery capable of suppressing an increase in DCR during cycles. There is provided a positive electrode active material for a nonaqueous electrolyte secondary battery that includes a secondary particle formed by aggregation of primary particles formed of a lithium transition metal oxide. A rare-earth compound secondary particle formed by aggregation of particles formed of a rare-earth compound adheres to a recess formed between primary particles adjacent to each other on a surface of the secondary particle, and the rare-earth compound secondary particle adheres to both the primary particles adjacent to each other in the recess. A tungsten-containing compound adheres to an interface of primary particles inside the secondary particle formed of the lithium transition metal oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.