Method for recovering lithium precursor from waste lithium secondary battery positive electrode material
AssigneeSK Innovation Co., Ltd.
InventorsSukjoon HONG, Jiyun PARK, Jeongbae YOON, Seungok LEE, Jimin KIM, Sungreal SON
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Abstract
A method for reducing waste by recovering a lithium precursor including: a) mixing a waste lithium secondary battery positive electrode material with urea to prepare a first mixture; b) firing the first mixture to prepare a second mixture; and c) subjecting the second mixture to water washing to obtain lithium hydroxide.
Claims20
A method for reducing waste by recovering a lithium precursor, the method comprising:
- a) mixing a waste lithium secondary battery positive electrode material with urea to prepare a first mixture;
- b) firing the first mixture to prepare a second mixture containing lithium hydroxide;
- and
- c) subjecting the second mixture to water washing to separate a lithium precursor.
A system for reducing waste by recovering a lithium precursor, the system comprising:
- a first mixer for mixing a waste lithium secondary battery positive electrode material with urea to prepare a first mixture;
- an oven for firing the first mixture to prepare a second mixture containing lithium hydroxide;
- and
- a second mixer for subjecting the second mixture to water washing to separate a lithium precursor.
A method for reducing waste by recovering a lithium precursor from a waste lithium secondary battery positive electrode material, the method comprising:
- a) pulverizing the waste lithium secondary battery positive electrode material to produce a pulverized mixture containing lithium;
- b) dry mixing the pulverized mixture with urea to produce a first mixture;
- c) firing the second mixture to obtain a preliminary precursor mixture containing the lithium;
- d) washing the second mixture in water to produce a lithium hydroxide.
Dependencies are inferred from the claim text.