公开(公告)号：US20230119544A1

公开(公告)日：2023-04-20

申请号：US17908740

申请日：2021-03-01

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Ryoei WATANABE ,  Yoshihiro HONMA ,  Chihiro NISHIKAWA ,  Masataka YAMASHITA ,  Jiahao LIU

IPC: C22B23/02 ,  H01M10/54 ,  C22B1/00

Abstract: Provided is a method for concentrating a valuable metal contained in a lithium ion secondary battery, for processing a lithium ion secondary battery containing at least one element selected from the group consisting of cobalt and nickel, or a positive electrode material of the lithium ion secondary battery, to concentrate a valuable metal containing either or both of cobalt and nickel. The method includes a thermal treatment step of thermally treating the lithium ion secondary battery or the positive electrode material thereof, to form a granular aggregate containing at least one valuable metal selected from the group consisting of cobalt and nickel.