Positive electrode active material for nonaqueous electrolyte secondary batteries, production method thereof, and nonaqueous electrolyte secondary battery
US11063257B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2016 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Mar 17, 2037 |
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 has a high charge/discharge capacity and produces high output, as well as has high filling ability. The positive electrode active material includes lithium-nickel composite oxide particles are formed by agglomeration of multiple primary particles, include pores, and have a layered crystal structure. The lithium-nickel composite oxide particles have an average particle size of 15 μm or more and 30 μm or less. The percentage of an area of the pores measured by a cross-sectional observation of the lithium-nickel composite oxide particles with respect to a cross-sectional area of the lithium-nickel composite oxide particles is 1.0% or more and 5.0% or less. A lithium-tungsten compound containing tungsten and lithium is present on the surface of and inside the secondary particles. The lithium-tungsten compound is present on at least part of the surface of the primary particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.