Reuse Method Of Active Material Of Positive Electrode

Abstract: A reuse method of an active material of a positive electrode of the present invention comprises the steps of: immersing a stack cell, in which a positive electrode plate, a separator, and a negative electrode plate are stacked and combined, in a polar solvent to separate the positive electrode plate; heat-treating the separated positive electrode plate to thermally decompose a binder and a conductive material in a positive electrode active material layer of the positive electrode plate, thereby separating a current collector of the positive electrode plate from the active material layer and recovering an active material in the active material layer; washing the recovered active material with an aqueous solution of a lithium compound, which exhibits basicity in an aqueous solution thereof; and adding a lithium precursor to the washed active material, followed by annealing, thereby obtaining a reusable active material.

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