Positive electrode active material and secondary battery provided with positive electrode active material
US11962005B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2021 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Oct 12, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a positive electrode active material having a spinel-type crystal structure that can reduce an increase in resistance and a decrease in capacity retention rate due to repeated charging and discharging of a non-aqueous electrolyte secondary battery. The positive electrode active material disclosed herein is configured of a lithium manganese composite oxide having a spinel-type crystal structure, wherein the lithium manganese composite oxide includes secondary particles in which a plurality of primary particles are aggregated, an average particle diameter of the secondary particles based on a SEM image is 10 μm or more and 20 μm or less, an average particle diameter of the primary particles based on a SEM image is 4 μm or more and 8 μm or less, and nickel atoms are provided in the surface layer portion of the secondary particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.