Method for manufacturing battery material

Patent metadata

Field	Value
Publication number	US-2025046899-A1
Application number	US-202418788130-A
Country	US
Kind code	A1
Filing date	Jul 30, 2024
Priority date	Aug 3, 2023
Publication date	Feb 6, 2025
Grant date	—

Abstract

A manufacture method disclosed herein includes: a preparation step S11 of preparing a recovery object; a measurement step S12 of measuring a quantity of oxygen element and a reducing component contained in the recovery object; a determination step S13 of determining whether or not a quantity ratio of the reducing component relative to oxygen element is higher than or equal to a threshold value based on a stoichiometric ratio of an oxide of the reducing component; a reducing component addition step S14 of adding the reducing component to the recovery object when a determined result value in the determination step is lower than the threshold value; and a heating step S15 of heating the recovery object under an inert atmosphere. This method makes it possible to reduce the valuable metal into an elemental metal, and therefore a valuable metal recovery efficiency can be improved.

First claim

What is claimed is:

1 . A method for manufacturing a battery material, comprising:
a preparation step of preparing a recovery object containing at least one of Ni and Co; a measurement step of measuring a quantity of oxygen element and a quantity of a reducing component contained in the recovery object; a determination step of determining whether or not a quantity ratio of the reducing component relative to oxygen element is higher than or equal to a threshold value based on a stoichiometric ratio of an oxide of the reducing component; a reducing component addition step of adding the reducing component to the recovery object when a determined result value in the determination step is lower than the threshold value; and a heating step of heating the recovery object under an inert atmosphere.

2 . The method according to claim 1 , wherein the reducing component is carbon element, and the threshold value is higher than or equal to a stoichiometric ratio of CO 2 .

3 . The method according to claim 1 , wherein the recovery object is heated at 650° C. to 1000° C. in the heating step.

4 . The method according to claim 1 , wherein the recovery object is heated under an argon or nitrogen atmosphere in the heating step.

5 . The method according to claim 1 , wherein a quantity of metal elements in the recovery object is measured and the quantity of oxygen element is calculated based on the quantity of the metal elements.

6 . The method according to claim 1 , wherein the recovery object contains at least one selected from a group consisting of a lithium-nickel composite oxide, a lithium-cobalt composite oxide, a lithium-nickel-manganese composite oxide, a lithium-manganese-cobalt composite oxide, a lithium-nickel-cobalt composite oxide, and a lithium-nickel-manganese-cobalt composite oxide.

7 . The method according to claim 1 , further comprising an acid exudation step of immersing the recovery object after the heating step into an acid liquid.

Assignees

• Prime Planet Energy & Solutions Inc
• Univ Tokyo

Inventors

• Suzuki Shinya
• Ouchi Takanari

Classifications

• C22B23/0415

  with acids or salt solutions except ammonium salts solutions · CPC title

• C22B23/02

  by dry processes · CPC title

• C22B1/02

  Roasting processes (C22B1/16 takes precedence) · CPC title

• C22B7/007

  by acid leaching · CPC title

• C22B7/001

  Dry processes · CPC title