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Research Article Open access CC BY 4.0

Alkaline Leaching of Metals from Cathodic Materials of Spent Lithium-Ion Batteries

Nango Gaye, Rokhaya Sylla Gueye, Jérôme Ledauphin, Mamadou Balde, Matar Seck, Alassane Wélé, Mahy Diaw

Asian Journal of Applied Chemistry Research · pp. 1–7 · Published 14 Jun 2019

10.9734/ajacr/2019/v3i230088

Abstract

The aim of this study was to recover metals from the positive electrode material for recycling in lithium-ion batteries. It was focused on research to optimize the hydrometallurgical pretreatment process of cathode materials for Li-ion batteries by varying parameters such as NaOH concentration, the ratio of solvent volume to mass of the test sample (liquid-solid ratio (L/S)) and reaction time. Thus, from used batteries collected in a local market (Colobane, Senegal), cathodic materials dried in an oven at 50°C for 24 hours, submitted to alkaline leaching with NaOH 2, 3 or 4N, followed by filtration, all at room temperature. The filtrates obtained were analyzed by atomic absorption spectrophotometry. The results obtained were showed that Al collectors could be better extracted with 4N NaOH for 5 hours at a ratio liquid/solid (L/S) = 10/1, with small quantities of the metals Co, Mn, Ni and Li found in the filtrates.

Batteries lithium-ion alkaline leaching recycling

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