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Reductive Leaching of Lithium-Ion Battery Cathode Active Material with Copper and Its Recovery by Cobalt Cementation

par Lukka, Venkata Hanuma Kumar;Jena, Arundhati;Jana, Prasanta;Venkatesan, Prakash ;Önal, Mehmet Ali Recai;Nagumothu, Kishore Babu;Borra, Chenna Rao
Référence Journal of Sustainable Metallurgy, 11, 3, page (2871-2882)
Publication Publié, 2025-09-01

Article révisé par les pairs

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Résumé :

Recycling of lithium-ion batteries (LIBs) is crucial for strengthening environmental sustainability and advancing toward a circular economy. Although the separation of spent battery cathodes yields a substance known as cathode active material (CAM), its purity falls short of reuse. The present study employs hydrometallurgical processes to extract and refine the valuable elements within the CAM. This study proposes a more cost-effective solution, utilizing copper (Cu) extracted from spent batteries instead of costly reductants like hydrogen peroxide (H2O2) or organic alternatives like glucose and citric acid. Through investigating various parameters including temperature, sulfuric acid (H2SO4) concentration, Cu addition amount and it is found that Cu addition significantly enhances CAM dissolution allowing more than 98% dissolution under optimized conditions. In the following step, a cementation technique is used to efficiently retrieve dissolved Cu using metallic Co thereby circumventing impurities and boosting cobalt recovery during solvent extraction. This way, a 94% Cu recovery is obtained under optimized cementation conditions, highlighting this study's efficiency for sustainable LIB recycling.