Method for recovering active material using positive electrode scrap

A method for recovering a positive electrode active material, comprising:

• (a) thermally treating a positive electrode scrap comprising a lithium composite transition metal oxide positive electrode active material layer including nickel, cobalt and manganese on a current collector in air at 300 to 650° C, for thermal decomposition a binder and a conductive material in the active material layer to separate the current collector from the active material layer, and collecting an active material in the active material layer;
• (b) washing the active material collected from the step (a) with a lithium compound solution which is basic in an aqueous solution, the lithium compound solution comprising a lithium compound in an amount of more than 0% and 15% or less for 1 hour or less, and drying;
• and
• (c) annealing the active material washed from the step (b) in air at 400 to 1000° C with an addition of at least one of LiOH, Li2CO3, LiNO3 or Li2O,
• wherein the recovered active material has a fluorine (F) content of 100 ppm or less, and
• wherein, during the thermal treatment in the step (a), the binder and the conductive material in the active material layer are thermally decomposed to produce H2O and CO2 by reacting with oxygen in air.