Polymer-based membrane enables selective Li ion separation from Na and K ions via electrodialysis

diagram: Illustration of lithium separation from brine through electrodialysis
diagram: Illustration of Lithium separation from brine through electrodialysis

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

Innovation 

We have developed a membrane incorporating a novel composite material (LLTO – Li0.33La0.56TiO3) designed to selectively separate Li from Na and K using electrodialysis. 

Achievement

  • The electrodialysis tests show exceptionally high Li/Na selectivity of >200 with >98% Li yield, significantly surpassing current state-of-the-art Li separation methods. 
  • K was not detected in any of the product streams, highlighting the membrane's effectiveness in selectively separating Li. 


Significance and Impact

  • Development of new membranes with improved Li/Na selectivity compared to current state-of-the-art membranes. 
  • Holds broad implications for industries such as battery manufacturing and energy storage.


Hub Target Addressed 

  • Developing highly selective separation from complex sources. 
  • Efficient use of energy and water.

 

bar graph: Metal composition in mol % before and after the electrodialysis
bar graph: Metal composition in mol % before and after the electrodialysis