Waste battery treatment method
AssigneeLG Energy Solution, Ltd.
InventorsEun Su Jang, Jeong Kyu Kim, Bon Sik Joo
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Abstract
The present invention relates to a waste battery treatment method which includes preparing a waste battery including a waste positive electrode which includes an aluminum current collector and a positive electrode active material layer formed on at least one surface of the aluminum current collector, heat treating the waste battery at a temperature of 650° C. or higher in an air atmosphere or oxidizing atmosphere to convert the aluminum current collector into aluminum oxide, and recovering aluminum oxide powder and positive electrode active material powder from the heat-treated waste battery.
Claims20
A waste battery treatment method comprising:
- preparing a waste battery including a waste positive electrode that includes an aluminum current collector and a positive electrode active material layer formed on at least one surface of the aluminum current collector;
- heat treating the waste battery including heat treating the waste battery at a temperature of 650° C. or higher in an air atmosphere or an oxidizing atmosphere to convert the aluminum current collector into aluminum oxide;
- recovering aluminum oxide powder and positive electrode active material powder from the heat-treated waste battery;
- and
- recovering a valuable metal from the positive electrode active material powder including adding the recovered positive electrode active material powder and the recovered aluminum oxide powder to an acidic solution to form a leachate, wherein the recovering of the valuable metal is without a process of extracting aluminum from a leachate.
Dependencies are inferred from the claim text.