Abstract
Spent lithium ion batteries (LIBs) contain lots of valuable metals such as nickel, cobalt, and manganese, together with organic solvents, binders, and other toxic materials. Therefore, recycling valuable metals from spent LIBs has the dual significance of comprehensive resource recovery and environmental protection. In this study, oxidation roasting was used to dispose of the cathode sheets of LIBs. The effects of roasting temperature and gas flow rate on the separation of cathode sheets, removing impurity elements of C, P, and Al, were investigated in detail. The results showed that the effective separation of active powder and Al foil can be achieved under the optimized conditions of temperature of 550 °C and gas flow rate of 300 mL/min. The increase of roasting temperature and gas flow rate are beneficial to the decomposition of LiPF6 and binders.
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