US 12,176,512 B2
Ambient-pressure regeneration of degraded lithium-ion battery cathodes
Zheng Chen, San Diego, CA (US); and Yang Shi, San Diego, CA (US)
Assigned to THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US)
Appl. No. 17/438,397
Filed by THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US)
PCT Filed Mar. 11, 2020, PCT No. PCT/US2020/022181
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2020/185958, PCT Pub. Date Sep. 17, 2020.
Claims priority of provisional application 62/816,816, filed on Mar. 11, 2019.
Prior Publication US 2022/0199966 A1, Jun. 23, 2022
Int. Cl. H01M 4/04 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/54 (2006.01)
CPC H01M 4/0471 (2013.01) [H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/54 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method of regenerating lithium-ion battery cathode materials from spent lithium-ion batteries, the method comprising:
mixing a eutectic molten salt solution with lithium-ion cathode materials to form a mixture;
heating the mixture at an ambient pressure to relithiate the lithium-ion cathode materials and generate a relithiated mixture; and
thermally annealing the relithiated mixture.