US 12,315,899 B2
Recycling and regeneration of lithium-ion battery cathodes
Zheng Chen, San Diego, CA (US); and Panpan Xu, San Diego, CA (US)
Assigned to THE REGENTS OF THE UNVERSITY OF CALIFORNIA, Oakland, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US)
Filed on Apr. 12, 2024, as Appl. No. 18/634,704.
Application 18/634,704 is a continuation of application No. 18/030,950, previously published as PCT/US2021/054295, filed on Oct. 8, 2021.
Claims priority of provisional application 63/090,136, filed on Oct. 9, 2020.
Prior Publication US 2024/0297357 A1, Sep. 5, 2024
Int. Cl. H01M 10/54 (2006.01); C22B 7/00 (2006.01); C22B 26/12 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/58 (2010.01)
CPC H01M 10/54 (2013.01) [C22B 7/006 (2013.01); C22B 26/12 (2013.01); H01M 4/0471 (2013.01); H01M 4/049 (2013.01); H01M 4/5825 (2013.01); H01M 2004/028 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A method for regeneration of spent olivine structure polyanion-type cathode material of lithium-ion batteries, the method comprising:
lithiating the cathode material in an aqueous relithiation solution comprising at least one organic reducing agent, the cathode material and a lithium salt to replenish lithium in the cathode material by heating the aqueous relithiation solution at a temperature in a range of 60° C. to 180° C. to produce a replenished lithiated cathode material; and
heating the replenished lithiated cathode material to cure defects in the replenished lithiated cathode material.