Recovery of LiCoO2 compound from cathodic paste of waste LIBs, by ultrasonography in lactic acid solution

摘要

Lithium-ion batteries (LIBs) are use in electric devices such as phones, cameras, laptops, etc. and also for electric automotive propulsion. More consumption means more amount of scrap. The wastes of LIBs contain rare and high value metals: Co (32 $/kg), Li, Ni, Cu, Al. Many recycling processes were developed with the purpose of recovering metals contained in used batteries. This paper presents a method for separation active cathodic paste (containing LiCoO2 compound) from the aluminum cathode using a solution of lactic acid and an ultrasonic bath. Cathodic paste has been detached from aluminum foils and analyzed by scanning electron microscopy (SEM) and X-ray diffractometry. The effects of the lactic acid concentration and the power of ultrasonic bath on separation efficiency were investigated.