| 초록 |
Li-ion batteries have a higher energy density, voltage capacity and lower self-discharge rate than other rechargeable batteries. Recently, they have been applied to many fields, from small electronic devices to electric vehicles and energy storage systems (ESS), and their usage has increased rapidly. As the demand increases, prices of raw materials for Li-ion batteries also soars. Thus, it is essential to ensure waste Li-ion battery recycling technology for a stable supply of Li-ion battery materials, and many companies actively study the recovery of valuable metals from waste Li-ion battery.In this study, we obtain metal solution for cathodic precursor from waste Li-ion battery. We synthesize optimal active material (NCM622) by controlling various variables such as temperature, synthesis time, co-precipitation/metal solution concentration ratio, and calcination temperature. It will be reported that the effect of impurities such as trace amount of Li, Al, and Mg in the metal solution is examined through electrochemical characteristic comparison with a general active material (NCM622). |
