Room Temperature Extraction of Co and Li from Ground Lithium-ion Secondary Battery Scrap.

Abstract

Lithium-ion secondary battery scrap, which contains LiCoO2, graphite and PVDF (poly vinyliden fluorine), was subjected to dry grinding using a planetary mill with and without quartz powder as a grinding aid, following its room temperature leaching using 1N HCl solution. The scrap material becomes amorphous state as grinding time and the quartz additive ratio increase. Accordingly, Co and Li in the scrap can be easily extracted from the ground product, and the former yield reaches about 90 mass% at 4-hour grinding with 50 wt% additive. Only about 2 mass% of F in PVDF in the scrap can be extracted under the same grinding condition.