Efficient recovery processes for the black mass from spent lithium-ion batteries
US11916206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2021 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Oct 7, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/84
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of recycling lithium-ion batteries is disclosed. The method includes isolating a composite electrode that comprises an electrode material adhered to a current collector with a polyvinylidene difluoride (PVDF) binder from a spent lithium-ion battery. The method also includes contacting the composite electrode in a polyol fluid capable of releasing the PVDF binder from the current collector without substantially altering either component. The composite electrode may be a cathode or an anode. The method also includes rapidly delaminating the electrode material from the current collector to give a free electrode material and a free current collector, and recovering each of the free electrode material and the free current collector from the mixture. The free electrode material may be reused to prepare another composite electrode, as well as a lithium-ion battery comprising the same, which are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.