Positive active material, method of preparing the same, and lithium secondary battery including the same
US11894557B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 2019 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Aug 10, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A positive active material includes a secondary particle in which a plurality of primary particles is agglomerated. The positive active material is composed of, in which a compound containing nickel, lithium, and oxygen. An average angle between a reference line connecting a center portion of the secondary particle and a center portion of the primary particle provided at the outermost portion of the secondary particle and a particle orientation line penetrating the center portion of the primary particle provided at the outermost portion of the secondary particle and extending in parallel to an orientation direction of the primary particles is 12.2° or less. A concentration of the nickel in the compound is 59 mol % or more. The compound further includes an added metal composed of a different element from the nickel and the lithium. The added metal includes one or more of boron (B) and tungsten (W).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.