Repurposing Kraft black Liquor as Reductant for Enhanced Lithium-Ion Battery Leaching

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

Carreira, ARF (Autor) Outra; Nogueira, AFM (Autor) Outra; Rocha, ILD (Autor) Outra; Sosa, F (Autor) Outra; Lopes, AMD (Autor) Outra; Passos, H (Autor) FEUP; Schaeffer, N (Autor) Outra; Coutinho, JAP (Autor) Outra

Revista

Título: ChemSusChem

Vol. 17

ISSN: 1864-5631

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 0 Citações

Scopus

Projetos Associados

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

Outras Informações

ID Authenticus: P-010-2XP

DOI: 10.1002/cssc.202301801

Abstract (EN): The economic advantages of H2SO4 make it the acid of choice for the hydrometallurgical treatment of waste lithium-ion batteries (LIBs). However, to facilitate the full dissolution of the higher valency metal oxides present in the cathode black mass, a suitable reducing agent is required. Herein, the application of industrial black liquor (BL) obtained from the Kraft pulping for papermaking is investigated as a renewable reducing agent for the enhanced leaching of transition metals from LIB powder with H2SO4. The addition of acidified BL to H2SO4 significantly improved the leaching efficiency for a range of LIB cathode chemistries, with the strongest effect observed for manganese-rich active material. Focusing on NMC111 (LiMnxCoyNizO2) material, a linear correlation between the BL concentration and the leaching yield of Mn was obtained, with the best overall leaching efficiencies being achieved for 2.0 mol L-1 H2SO4 and 50 vol % of BL at 353 K. A quasi-total degradation of oxygenated and aromatic groups from the BL during NMC111 dissolution was observed after leaching, suggesting that these chemical groups are essential for LIB reduction. Finally, the leached transition metals could be easily recovered by pH adjustment and oxalic acid addition, closing the resource loop and fostering resource efficiency.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14