As a positive electrode active material for rechargeable lithium ion batteries
US12294078B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 2, 2020 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Feb 15, 2042 |
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 powder suitable for lithium-ion batteries, comprising lithium transition metal-based oxide particles comprising a core and a surface layer, said surface layer being on top of said core, said particles comprising the elements: Li, a metal M′ and oxygen, wherein the metal M′ has a formula: M′=(NizMnyCox)1-kAk, wherein A is a dopant, 0.55≤z≤0.89, 0.05≤y≤0.25, 0.05≤x≤0.25, x+y+z+k=1, and k≤0.01, said positive electrode active material powder having a mean particle size D50 ranging from 3 μm to 15 μm and a surface layer thickness ranging from 5 nm to 200 nm. The surface layer comprises aluminum in a content superior or equal to 0.04 wt % and inferior or equal to 0.15 wt % relative to the total weight of the positive electrode active material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.