Invention Grant
- Patent Title: Direct recycling of lithium-ion battery scraps for manufacturing a new anode
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Application No.: US17386660Application Date: 2021-07-28
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Publication No.: US11721850B2Publication Date: 2023-08-08
- Inventor: Yaocai Bai , Ilias Belharouak , Rachid Essehli
- Applicant: UT-Battelle, LLC
- Applicant Address: US TN Oak Ridge
- Assignee: UT-BATTELLE, LLC
- Current Assignee: UT-BATTELLE, LLC
- Current Assignee Address: US TN Oak Ridge
- Agency: Warner Norcross + Judd LLP
- Main IPC: H01M10/54
- IPC: H01M10/54 ; H01M10/0525 ; H01M10/623 ; H01M4/62 ; H01M4/583 ; H01M4/66 ; H01M4/133

Abstract:
An improved method of recycling lithium-ion battery anode scraps is provided. The method involves isolating an anode scrap including a graphite anode film adhered to a current collector foil with a polyvinylidene fluoride binder. The anode scrap is combined with deionized water to form a first mixture. The graphite anode film is delaminated from the current collector foil to form a second mixture comprising a free collector foil and a free graphite anode film. The free graphite anode film is filtered and dried from the second mixture to recover the free graphite anode film. The free graphite anode film is combined with a solvent comprising N-methyl-2-pyrrolidone (NMP) to form an anode formation slurry. The slurry is coated onto a copper current collector to produce a new anode.
Public/Granted literature
- US20230033430A1 DIRECT RECYCLING OF LITHIUM-ION BATTERY SCRAPS FOR MANUFACTURING A NEW ANODE Public/Granted day:2023-02-02
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