US 12,438,210 B2
Apparatus for recovering active material and method for reusing active material by using same
Min-Seo Kim, Daejeon (KR); Se-Ho Park, Daejeon (KR); and Doo-Kyung Yang, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/912,017
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jul. 1, 2021, PCT No. PCT/KR2021/008377
§ 371(c)(1), (2) Date Sep. 15, 2022,
PCT Pub. No. WO2022/035053, PCT Pub. Date Feb. 17, 2022.
Claims priority of application No. 10-2020-0101962 (KR), filed on Aug. 13, 2020.
Prior Publication US 2023/0139010 A1, May 4, 2023
Int. Cl. H01M 10/54 (2006.01); C22B 1/02 (2006.01); C22B 7/00 (2006.01); C22B 26/12 (2006.01)
CPC H01M 10/54 (2013.01) [C22B 1/02 (2013.01); C22B 7/001 (2013.01); C22B 7/008 (2013.01); C22B 26/12 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An active material recovery apparatus which is a rotary firing apparatus having a rod of a screw type therein, the active material recovery apparatus comprising:
a heat treatment bath and a screening wall arranged in a line along an axis of the rod, wherein the heat treatment bath constitutes a heating zone, and the screening wall constitutes a cooling zone; and
an exhaust injection and degassing system,
wherein the heat treatment bath is configured to removes a binder and a conductive material from an active material layer by performing heat treatment in air on an electrode scrap comprising the active material layer on a current collector while rotating the electrode scrap around the axis of the rod, and separate the current collector from the active material layer, and
wherein an active material in the active material layer passes through the screening wall and is recovered as the active material in powder form, and the current collector that does not pass through the screening wall is recovered separately.