Co recovery from spent Li-ion battery by acid leaching - a comparative study Online publication date: Thu, 25-Aug-2016
by M.Z.H. Khan; Md. Iftekharul Alam; Most. Sheauly Khatun; Md. Rafiul Hasan; Md. Rashid Al-Mamun; Md. Faridul Islam; Mala Khan; Sumiya Aktar; S. Akther; K. Fatema
International Journal of Environment and Waste Management (IJEWM), Vol. 17, No. 3/4, 2016
Abstract: We investigated and compared leaching processes with different acids for the recovery of cobalt from the cathode active materials of spent lithium-ion batteries. The active substances separated from the cathode of spent lithium-ion batteries were dissolved in each acid solutions, and precipitated as CoC2O4•2H2O. The structural morphology of the cathode materials before and after leaching were characterised by X-ray diffraction (XRD). The amount of Co present in the leachate was determined by atomic absorption spectrophotometry (AAS). The experimental study shows that 93% of Co (mass fraction) can be dissolved in the solution of 1.5 M HCl, 2.0% H2O2 (volume fraction), and S:L of 20 g/L−1 results the highest efficient recovery within 60 min at 90°C comparing other acids in this study.
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