Non-aqueous electrolyte secondary battery positive electrode active material and method for producing same, and non-aqueous electrolyte secondary battery which uses positive electrode active material
US12381214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2024 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Mar 21, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle, wherein the secondary particle has a hollow structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [%].
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.