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Efficient recovery processes for the black mass from spent lithium-ion batteries

Patent ·
OSTI ID:2541877
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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.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
11,916,206
Application Number:
17/177,120
OSTI ID:
2541877
Country of Publication:
United States
Language:
English

References (3)

Innovative application of ionic liquid to separate Al and cathode materials from spent high-power lithium-ion batteries journal April 2014
Efficient Separation of Aluminum Foil and Cathode Materials from Spent Lithium-Ion Batteries Using a Low-Temperature Molten Salt journal March 2019
Recovery of cathode materials and Al from spent lithium-ion batteries by ultrasonic cleaning journal December 2015

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