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US 12,744,262 B2Granted
Method for recovering active metals from lithium secondary battery
AssigneeSK Innovation Co., Ltd.
InventorsSuk Joon Hong, Ji Min Kim, Ji Yun Park, Sung Real Son
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Abstract
In a method for recovering active metals from a lithium secondary battery according to exemplary embodiments, a cathode active material mixture including a lithium composite oxide may be reacted with a reducing reaction gas under a pressurized condition and washed with water. In this case, a large amount of the cathode active material mixture may be treated within a shortened process time, and the active metal may be recovered with high yield and high efficiency.
Claims9
A method for recovering an active metal from a lithium secondary battery, the method comprising:
- removing a cathode current collector from a waste cathode and obtaining a cathode active material mixture including a lithium composite oxide;
- forming a preliminary precursor mixture by reacting the cathode active material mixture with a reducing reaction gas under a pressurized condition of 3 to 24 bar, wherein a reaction with the reducing reaction gas is performed at a temperature in a range of 420° C. to 500° C. for less than one hour, and the reducing reaction gas includes hydrogen and a carrier gas, and a concentration of the hydrogen in the reducing reaction gas is 10 to 40 volume %;
- and
- recovering a lithium precursor by performing water washing treatment on the preliminary precursor mixture.
1 more element
Dependencies are inferred from the claim text.