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Title	Electrochemical-assisted leaching of active materials from lithium ion batteries
ID_Doc	8068
Authors	Diaz, LA; Strauss, ML; Adhikari, B; Klaehn, JR; McNally, JS; Lister, TE
Title	Electrochemical-assisted leaching of active materials from lithium ion batteries
Year	2020
Published
Abstract	The development of a circular economy for lithium-ion batteries (LIB) is essential to realize decarbonization and an electrified energy market. However, the current commercial operations that recover valuable constituents from LIBs require significant energy and reagents, which create toxic emissions and additional waste. We report an electrochemical-based method for leaching valuable metals from the active materials of mixed shredded LIBs. In this process, the use electrons, as green reagent, allows the use and regeneration of Fe2+ in low concentrations as substitute for hydrogen peroxide as a reducing agent. Leaching in a membrane separated two-compartment electrochemical cell contributes to decrease the acid requirements as H+ can be generated electrochemically. With this design, leaching efficiencies over 96% for the active metals (Li, Co, Mn, and Ni) were demonstrated at pulp densities up to 240 g/L. Copper present in the active material is electrowon and recovered separately. Preliminary cost analyses demonstrate ca. 80% reduction in energy and chemical costs as compared to traditional hydrometallurgical routes.
PDF	http://manuscript.elsevier.com/S0921344920302184/pdf/S0921344920302184.pdf

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