Process study of chloride roasting and water leaching for the extraction of valuable metals from spent lithium-ion batteries

A chlorination roasting-water leaching process to recover Li, Ni, Co, and Mn from spent Li-ion batteries is introduced in this paper. The key parameters were studied optimized, over 98% of 97% can be leached out under the most suitable condition 350 °C roasting temperature, 30 min time, a 2:1 mass ratio NH4Cl cathode powder. During process, first sublimated transformed into H3N···HCl(g) complex, then reacts with LiNi0.5Co0.2Mn0.3O2 produce intermediate products (NH4)2MCl4·2H2O (M = Mn), which further decomposed water soluble NH4MCl3 Mn) at higher temperatures. results show that efficient extracting valuable metals lithium-ion batteries, providing new recycling route for batteries.