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A novel recycling route for spent lithium-ion batteries has been investigated. The end goal is to produce cathodeactive material (CAM) precursor directly from the recycled solution. The process begins with an oxalic acidleaching (0.6 M H₂C₂O₄, 60 ^◦C, 120 min, and S/L = 50 g/L), where Li is selectively recovered (along with Al)which reduces downstream contamination and enhances overall material efficiency. The resulting residue, amixture of (Co,Ni,Mn)C₂O₄ ⋅ 2H₂O, graphite, and Cu, is then leached with sulfuric acid to dissolve the metals andseparate them from the graphite. This second leaching operation is investigated, and the optimum parameters aredemonstrated (2 M H₂SO₄, 65 ^◦C, 120 min, S/L = 20 g/L), yielding more than 95 % recovery of Ni, Co, and Mnand about 70 % of Cu. Lower acidity or S/L leads to the reprecipitation of a Ni oxalate phase. Solvent extractionis selected for Cu removal at a limit of 5 ppm; a 30 % v/v Acorga M5640 in ESCAID is applied for 30 min at 25 ^◦C,with θ = 4 and 4 stages. The resulting recycled solution, containing Co, Ni, and Mn, and free from Al, Li, and Cu,represents a promising feedstock for producing NMC 111 (LiNi_0.33Mn_0.33Co_0.33O₂).