Positive electrode active material for secondary battery and secondary battery including the same
US10818916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2016 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Sep 26, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are a positive electrode active material for a secondary battery which may exhibit excellent capacity and life characteristics when used in the battery by including a core, and a surface treatment layer disposed on a surface of the core, wherein the core is a secondary particle including a plurality of primary particles, the primary particles include a polycrystalline lithium composite metal oxide of Formula 1 having an average grain diameter of 50 nm to 200 nm, and the surface treatment layer includes a lithium oxide including lithium and at least one metal selected from the group consisting of boron (B), tungsten (W), hafnium (Hf), niobium (Nb), tantalum (Ta), molybdenum (Mo), silicon (Si), tin (Sn), and zirconium (Zr), and a secondary battery including the same, LiaNi1-x-yCoxM1yM3zM2wO2 [Formula 1](in Formula 1, M1, M2, M3, a, x, y, z, and w are the same as those defined in the specification).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.