METHOD OF ELECTRO-REDUCTION EXTRACTION OF COBALT FROM CATHODIC ACTIVE MATERIAL OF LITHIUM BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a method for extracting cobalt from cathode active material for lithium battery with a simpler process at a lower cost than conventional methods.SOLUTION: The method for recovering cobalt from cathode active material for lithium battery according to the present invention comprises: electrolyzing sulfuric acid solution saturated with sulfurous acid gas to produce dithionite ions; and reducing cobalt in the cathode active material for lithium battery with the dithionite ions.