Positive electrode active material for nonaqueous electrolyte secondary batteries, method for producing same, and nonaqueous electrolyte secondary battery
US11165062B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2017 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Dec 23, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2004/028
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a positive electrode active material with which a nonaqueous electrolyte secondary battery can be obtained that achieves both high energy density and output characteristics and thermal stability at the time of short-circuit owing to low conductivity. A positive electrode active material for a nonaqueous electrolyte secondary battery contains a lithium-nickel-manganese composite oxide containing a secondary particle formed of a plurality of flocculated primary particles. The lithium-nickel-manganese composite oxide is represented by General Formula (1): LidNi1-a-b-cMnaMbNbcO2+γ, at least part of niobium is solid-solved in the primary particles, and a maximum niobium concentration within the primary particles is at least one time and up to three times an average niobium concentration within the primary particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.