Active Material Reuse Method Using Cathode Scraps

Abstract: A method for recovering an active material from cathode scraps and reusing same is provided. A cathode active material reuse method of the present invention obtains a reusable active material through the steps of: (a) heat treating, in air, cathode scraps each of which comprises a lithium transition metal composite oxide cathode active material layer on a current collector, so as to thermally decompose a binder and a conductive material, which are contained in the active material layer, thereby separating the current collector from the active material layer and recovering an active material contained in the active material layer; (b) washing the recovered active material with a washing solution; (c) adding a lithium precursor to the washed active material and annealing same; and (d) selectively surface-coating the annealed active material, wherein the amount of lithium precursor added in step (c) is determined so that the amount of the lithium compound remaining in the reusable active material is 0.0001-1.2 wt%.

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents