Positive electrode active material for nonaqueous electrolyte secondary battery, method for producing the same, and nonaqueous electrolyte secondary battery
US11735726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 25, 2017 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Aug 1, 2040 |
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 a nonaqueous electrolyte secondary battery is disclosed which contains a lithium-nickel-manganese composite oxide containing a secondary particle formed of a plurality of flocculated primary particles and a lithium-niobium compound. The positive electrode active material is represented by General Formula (1): LidNi1−a−b−cMnaMbNbcO2+γ (M is at least one element selected from Co, W, Mo, V, Mg, Ca, Al, Ti, Cr, Zr, and Ta; and 0.03≤a≤0.60, 0≤b≤0.60, 0.02≤c≤0.08, a+b+c<1, 0.95≤d≤1.20, and 0≤γ≤0.5, the lithium-nickel-manganese composite oxide has a (003)-plane crystallite diameter of at least 50 nm and up to 130 nm, the lithium-niobium compound is present on surfaces of the primary particles, and part of niobium in the positive electrode active material is solid-solved in the primary particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.