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Recycling automotive Li(NiyMnzCo1-y-z)O2 /C batteries

Sravya Kosaraju (Institutionen för kemi- och bioteknik, Industriell materialåtervinning) ; Christian Ekberg (Institutionen för kemi- och bioteknik, Kärnkemi ; Institutionen för kemi- och bioteknik, Industriell materialåtervinning) ; Stefan Allard (Institutionen för kemi- och bioteknik, Industriell materialåtervinning ; Institutionen för kemi- och bioteknik, Kärnkemi)
27th International Mineral Processing Congress, IMPC 2014, Santiago, Chile, 20-24 October 2014 (2014)
[Konferensbidrag, refereegranskat]

Li-ion batteries are now used in electric vehicles (EVs), plug-in hybrid vehicles (PHEVs) and, hybrid electric vehicles (HEVs). Nanostructured Li(NiyMnzCo1-y-z)O2 is one of the more popular cathode chemistries for automotive Li-ion battery, due to its enhanced properties such as large surface area, short diffusion length, enhanced ionic and electronic conductivity, improved mechanical strength and structural integrity [Pan et al, #y2013]. Recycling of Li-ion batteries helps to mitigate environmental effects of virgin metal extractions along with improper disposal of end of life batteries. To fulfill these objectives of the recycling, recovery of pure streams of the involved metals should be considered. In this study, the batteries were first discharged and dismantled in an inert atmosphere (Ar). The electrodes were then heat treated in a box furnace. This was done in order to break the chains of the adhesive (PVDF) and consequently separate the metallic substrates Cu and Al from the electrochemically active compound. This heat-treatment also helped to simplify the dissolution of the metal constituents in the electrochemically active compound from the cathode in the acid leaching process. Solvent extraction was chosen to achieve separation and recovery of metals with higher purity from these leachates. In the scope of the present work, a complete process from the point of dismantling to separation of constituent metals using solvent extraction was studied.

Nyckelord: Li-ion battery recycling, Metal recovery, Hydrometallurgy, Solvent extraction, NMC electrode



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Denna post skapades 2015-01-28. Senast ändrad 2015-11-05.
CPL Pubid: 211621

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Industriell materialåtervinning (2007-2014)
Institutionen för kemi- och bioteknik, Kärnkemi (2005-2014)

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Chalmers infrastruktur