Positive electrode active material for secondary battery, method for preparing same, and secondary battery comprising same
US10535874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2016 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Mar 24, 2038 |
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 secondary battery is provided. The positive electrode active material is a secondary particle including primary particles of a lithium composite metal oxide that contains nickel, cobalt, and manganese, wherein the manganese content in the lithium composite metal oxide exceeds 50 at % with respect to the sum content of nickel, cobalt, and manganese, and the primary particle is doped with one or two or more dopant elements selected from the group consisting of Nb, Sn, Mo, and Ta, the dopant element content being higher in a surface region of the primary particle than in the interior of the primary particle, and the dopant element concentration being 500 to 5,000 ppm with respect to the total weight of the positive electrode active material. In addition, a lithium secondary battery which includes the positive electrode active material is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.