Method for recovering active metal of lithium secondary battery
AssigneeSK Innovation Co., Ltd.
InventorsYoung Bin Seo, Min Ji Sung, Ji Min Kim, Seung Ok Lee, In Ae Lee
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Abstract
In a method for recovering active metals of a lithium secondary battery according to an embodiment, a cathode active material mixture is collected from the cathode of the lithium secondary battery, the cathode active material mixture is reduced by a reducing reaction to prepare a preliminary precursor mixture, an aqueous lithium precursor solution is formed from the preliminary precursor mixture, and an aluminum-containing material is removed from the aqueous lithium precursor solution with an aluminum removing resin.
Claims20
A method for recovering a cathode active metal of a lithium secondary battery, the method comprising:
- collecting a cathode material comprising a cathode active material mixture and an aluminum-containing material from a lithium secondary battery;
- preparing a preliminary precursor mixture from the cathode material by a reductive reaction of the cathode active material mixture;
- forming an aqueous lithium precursor solution from the preliminary precursor mixture;
- removing the aluminum-containing material from the aqueous lithium precursor solution by using an aluminum removal resin;
- and
- recovering the cathode active material from the aqueous lithium precursor solution from which the aluminum-containing material is removed,
- wherein the preparing of the preliminary precursor mixture comprises supplying a reductive gas into a fluidized bed reactor.
A method for recycling a cathode active metal from a waste or failure lithium secondary battery, the method comprising:
- collecting a cathode material comprising a cathode active material mixture comprising an oxide containing lithium and a transition metal, and an aluminum-containing material, from the waste or failure lithium secondary battery;
- preparing a preliminary precursor mixture comprising a preliminary lithium precursor particle and a transition metal-containing particle, from the cathode material, by a reductive reaction of the cathode active material mixture;
- reacting the preliminary precursor mixture with a leaching liquid to form an aqueous lithium precursor solution;
- removing the aluminum-containing material from the aqueous lithium precursor solution by using an aluminum removal resin, wherein the aluminum removal resin contains an amine group and at least one hydroxyl group;
- and
- recovering the oxide containing lithium and the transition metal from the aqueous lithium precursor solution from which the aluminum-containing material is removed,
- wherein the preparing of the preliminary precursor mixture comprises supplying a reductive gas into a fluidized bed reactor.
Dependencies are inferred from the claim text.