公开(公告)号：US20240356098A1

公开(公告)日：2024-10-24

申请号：US18684825

申请日：2022-08-19

申请人： LG ENERGY SOLUTION, LTD.

发明人： Min-Seo KIM ,  Doo-Kyung YANG ,  Se-Ho PARK ,  Yong-Sik SEO ,  Eun-Kyu SEONG ,  Jeong-Bae LEE

IPC分类号： H01M10/54 ,  B09B3/40 ,  B09B3/70 ,  B09B101/16 ,  H01M4/02 ,  H01M4/36 ,  H01M4/525 ,  H01M4/62

CPC分类号： H01M10/54 ,  B09B3/40 ,  B09B3/70 ,  H01M4/366 ,  H01M4/525 ,  H01M4/62 ,  B09B2101/16 ,  H01M2004/028

摘要： Disclosed is a method of producing a reusable positive electrode active material, including the steps of: dipping a stack cell including a stacked and integrated positive electrode plate, separator and negative electrode plate, in a polar solvent to separate the positive electrode plate; heat treating the separated positive electrode plate to perform thermal decomposition of a binder and a conductive material in a positive electrode material layer of the positive electrode plate, separating a current collector from the positive electrode plate and recovering an active material from the positive electrode active material layer; washing the recovered active material with an aqueous lithium compound solution showing alkalinity in an aqueous solution state; and adding a lithium precursor to the washed active material and carrying out annealing to obtain a reusable positive electrode active material.

公开(公告)号：US20240106020A1

公开(公告)日：2024-03-28

申请号：US18268043

申请日：2022-08-01

申请人： LG ENERGY SOLUTION, LTD.

发明人： Eun-Kyu SEONG ,  Min-Seo KIM ,  Se-Ho PARK ,  Yong-Sik SEO ,  Doo-Kyung YANG ,  Jeong-Bae LEE

IPC分类号： H01M10/54 ,  C01G53/00 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525

CPC分类号： H01M10/54 ,  C01G53/44 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028

摘要： Provided is a method for recovering and reusing an active material from a positive electrode scrap. The method for reusing a positive electrode active material, including the steps of: heat treating a positive electrode scrap including a lithium transition metal composite oxide positive electrode active material layer including nickel, cobalt and manganese or aluminum on a current collector to perform thermal decomposition of the binder and conductive material in the active material layer, thereby separating the current collector from the active material layer and recovering the active material in the active material layer; performing a first washing of the recovered active material with an aqueous lithium compound solution showing alkalinity in an aqueous solution state; adding a lithium precursor to the washed active material and carrying out annealing; performing a second washing of the annealed active material; and surface coating the washed active material after the second washing step to obtain a reusable active material.