US 11,721,850 B2
Direct recycling of lithium-ion battery scraps for manufacturing a new anode
Yaocai Bai, Oak Ridge, TN (US); Ilias Belharouak, Oak Ridge, TN (US); and Rachid Essehli, Oak Ridge, TN (US)
Assigned to UT-BATTELLE, LLC, Oak Ridge, TN (US)
Filed by UT-Battelle, LLC, Oak Ridge, TN (US)
Filed on Jul. 28, 2021, as Appl. No. 17/386,660.
Prior Publication US 2023/0033430 A1, Feb. 2, 2023
Int. Cl. H01M 10/54 (2006.01); H01M 10/0525 (2010.01); H01M 10/623 (2014.01); H01M 4/62 (2006.01); H01M 4/583 (2010.01); H01M 4/66 (2006.01); H01M 4/133 (2010.01)
CPC H01M 10/54 (2013.01) [H01M 4/133 (2013.01); H01M 4/583 (2013.01); H01M 4/623 (2013.01); H01M 4/662 (2013.01); H01M 10/0525 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of recycling lithium-ion battery anodes, said method comprising:
isolating an anode scrap, the anode scrap comprising a graphite anode film adhered to a current collector foil with a polyvinylidene fluoride (PVDF) binder;
combining deionized water with the anode scrap to form a first mixture;
delaminating the graphite anode film from the current collector foil to form a second mixture comprising a free collector foil and a free graphite anode film;
filtering and drying the free graphite anode film from the second mixture to recover the free graphite anode film;
combining the free graphite anode film with a solvent comprising N-methyl-2-pyrrolidone (NMP) to form an anode formation slurry; and
wherein combining the deionized water with the anode scrap occurs before delaminating the graphite anode film from the current collector foil.