Process for preparing a positive electrode material for rechargeable lithium ion batteries
US12351477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2020 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | Nov 7, 2042 |
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 process is presented for preparing a positive electrode active material for rechargeable lithium ion batteries. The process comprises a sintering step having a short sintering time. This improves the production throughput. More particularly, the process applies to positive electrode active material powders having a general formula Li(1+a)(NixMnyCozMec)(1−a)O2, wherein Me comprises at least one element of the group consisting of Al, Mg, Ti, Zr, W, Nb, B, and Sr, with −0.1≤a≤0.1, 0.33≤x≤0.95, 0≤y≤0.35, 0<z≤0.35, 0≤c≤0.05, and x+y+z+c=1. The sintering step is performed for a predefined sintering time ts, expressed in hours, and at a predefined temperature Ts, expressed in ° C., such that 0.3≤ts≤6.0, and 1140+50 Log10 (6/t)−580 x≤Ts≤1245+50 Log10(6/ts)−580 x.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.