Method for preparing a positive electrode material for rechargeable lithium ion batteries
US12394790B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Apr 24, 2020 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Nov 26, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to a process for manufacturing lithium nickel cobalt oxide-based cathode compounds for lithium ion secondary batteries. As part of this process, nickel, cobalt, and optionally manganese-bearing precursor compounds are lithiated and sintered at a high temperature. When cooled down, a high cooling rate will benefit the throughput of the process and the economics. It has however been found that the cooling rate should not exceed 10° C./min in what has been determined to be a critical temperature domain, ranging from 700° C. to 550° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.