Title:
METHOD FOR PROCESSING LITHIUM ION SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2023135553
Kind Code:
A
Abstract:
To provide a treatment method of a lithium ion secondary battery capable of recovering lithium contained in the lithium ion secondary battery at good efficiency and high purity.SOLUTION: There is provided a treatment method of a lithium ion secondary battery, including: a pulverization and classification step of pulverizing and classifying a lithium ion secondary battery to obtain an electrode material containing at least lithium; a leaching step of immersing the electrode material in an acid to obtain a leachate; a pH adjustment step of adding lithium hydroxide to the leachate to adjust the pH; a metal recovery step of recovering metals other than lithium in the leachate to obtain a lithium-containing liquid; and a lithium hydroxide recovery step of recovering lithium in the lithium-containing liquid as lithium hydroxide, wherein the lithium hydroxide recovered in the lithium hydroxide recovery step is used in the pH adjustment step.SELECTED DRAWING: Figure 1
Inventors:
KAWASAKI HAJIME
HAYASHI HIROSHI
SATO RYOSUKE
HAYASHI HIROSHI
SATO RYOSUKE
Application Number:
JP2022040824A
Publication Date:
September 28, 2023
Filing Date:
March 15, 2022
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
C22B7/00; C22B1/00; C22B3/06; C22B3/26; C22B3/44; C22B26/12; C25B1/16
Attorney, Agent or Firm:
Yasushi Matsunuma
Mitsuo Teramoto
Fumihiro Hosokawa
Onami Kazunori
Mitsuo Teramoto
Fumihiro Hosokawa
Onami Kazunori