Impurity removal provides LIB leachate suitable for Ni/Co SX-based separations

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

Achievement

Demonstrated scaled (60L) solvent extraction (SX), achieving 99% extraction after impurity (Fe, Al, Zn) removal from Lithium Ion Battery (LIB) leachate.

Significance

Method developed to remove impurities from electrochemical (EC) leachate is compatible with downstream SX separation, showing integration of novel energy-efficient LIB recycling process with proven methods for production of high purity LIB metal salts.

Details and impact

Ammonium and phosphate residues from impurity removal (by precipitation of Fe, Al, Zn phosphates) did not hinder SX separation.

chart with eight cells showing recovery anticipated to improve with additional process time or using different extractant
Recovery anticipated to improve with additional process time or using different extractant