Scale-up of electrochemical leaching cell

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image of scale-up of electrochemical leaching
image of scale-up of electrochemical leaching

CMI researchers at Idaho National Laboratory conducted the research for this highlight

Achievement
Scale-up of the EC-leach for lithium-ion batteries black mass, with a capacity up to 500 g/day has been completed and successfully demonstrated, achieving over 96% leaching efficiency for all metals.   

Significance and impact

  • 10X scale up performed with no effect in leaching efficiency.
  • Scale up using reactors in series allows increase in voltage while maintaining low currents, more suitable for a power grid that delivers energy at high voltage.
  • Demonstrated a reference electrode is not necessary and that conventional power supplies (i.e., rectifiers) can be used.

Details and next steps

  • Leachate concentrate with over 70 g/L metal concentration with a process volume of 2 L.
  • System integrates a pH pump to control final pH of the leachate
  • Increased volume was required for INL’s mixer settler beds to examine SX separation
table of data for scale-up of electrochemical leaching
Table of data for scale-up of electrochemical leaching