Extraction of metals from spent lithium ion batteries- Role of acid, reductant and process intensification in recycling

Meshram P., Abhilash A., Pandey B. D., Mankhand T. R., DEVECİ H.

INDIAN JOURNAL OF CHEMICAL TECHNOLOGY, vol.25, no.4, pp.368-375, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 4
  • Publication Date: 2018
  • Journal Name: INDIAN JOURNAL OF CHEMICAL TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.368-375
  • Keywords: Spent LIBs, Recycling, Sulfuric acid, Reductant, Baking, NITRIC-ACID, GLUCOSE
  • Karadeniz Technical University Affiliated: Yes

Abstract

A comparison of various approaches evaluated to process spent lithium ion batteries to extract metals has been carried out. The leaching is carried out with sulphuric acid in the presence and absence of reductant, thus defining the role of reducing agent (NaHSO3 and H-2 O-2) in assisting dissolution of all metals, especially Co and Mn. As the direct process incurs all metals in solution and employs high concentration of acid, a two-step process (acid baking and leaching) has been attempted to lower acid consumption indicating benefits in the selective dissolution of metals viz., Co and Li (in 1(st) stage) over other metals (Ni and Mn in 2(n)(d) stage).