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Direct regeneration of lithium ion cathodes by ionothermal relithiation

Patent ·
OSTI ID:2542234
; ; ; ; ;
A method for relithiating cathode material from spent lithium-based batteries, the method comprising: (i) mixing delithiated cathode material and a lithium salt with an ionic liquid in which the lithium salt is at least partially soluble to form an initial mixture; (ii) heating the initial mixture to a temperature of 100° C. to 300° C. to result in relithiation of the delithiated cathode material; and (iii) separating the ionic liquid from the relithiated cathode material; wherein, in embodiments, the cathode material is a lithium metal oxide, wherein the metal is selected from the group consisting of Ni, Co, Fe, Mn, Al, Zr, Ti, Nb, and combinations thereof, or wherein the cathode material has the formula LiNixMnyCozO2, wherein x>0, y>0, z>0, and x+y+z=1; wherein, in some embodiments, the ionic liquid has a nitrogen-containing cationic portion, such as an imidazolium ionic liquid.
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):
11,996,557
Application Number:
17/736,426
OSTI ID:
2542234
Country of Publication:
United States
Language:
English

References (7)

Preparation of Inorganic Materials Using Ionic Liquids journal January 2010
Ambient‐Pressure Relithiation of Degraded Li x Ni 0.5 Co 0.2 Mn 0.3 O 2 (0 < x < 1) via Eutectic Solutions for Direct Regeneration of Lithium‐Ion Battery Cathodes journal April 2019
Li(Ni1/3Co1/3Mn1/3)O2 as a suitable cathode for high power applications journal September 2003
Safety characteristics of Li(Ni0.8Co0.15Al0.05)O2 and Li(Ni1/3Co1/3Mn1/3)O2 journal February 2006
Recycling End-of-Life Electric Vehicle Lithium-Ion Batteries journal November 2019
Ionothermal Synthesis of Tailor-Made LiFePO4 Powders for Li-Ion Battery Applications journal February 2009
Motility of copepod nauplii and implications for food encounter journal January 2003

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