Method for recycling waste lithium iron phosphate by selective oxidation-reduction, recycled lithium iron phosphate, and lithium ion battery
US12021206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2020 |
| Grant date | Jun 25, 2024 |
| Priority date | — |
| Expiry date | May 16, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/84
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for recycling waste lithium iron phosphate is by selective oxidation-reduction, to obtain recycled lithium iron phosphate, and a lithium ion battery. The method includes: primarily sintering waste lithium iron phosphate under a condition where a mild oxidizing gas is introduced; separating a lithium iron phosphate powder material; supplementing lithium and supplementing carbon to the lithium iron phosphate powder material and regulating the composition of the lithium iron phosphate powder material using a lithium source and a carbon source by secondary sintering to obtain recycled lithium iron phosphate, wherein the mild oxidizing gas is water vapor, CO2 gas, or a mixed gas thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.