Patent ID: 11901528
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A method of making a reusable positive electrode active material, comprising:
(a) thermally treating positive electrode scrap comprising a lithium composition transition metal oxide positive electrode active material layer on a current collector in air for thermal decomposition of a binder and a conductive material in the active material layer, to separate the current collector from the active material layer, and collecting an active material in the active material layer;
(b-1) washing the active material collected from the step (a) with a lithium compound solution which is basic in an aqueous solution;
(b-2) mixing the active material washed from the step (b-1) with a lithium precursor solution and spray drying; and
(c) annealing the active material spray dried from the step (b-2) to obtain a reusable active material.