Thermodynamic Analysis of the Recovery of Metallic Mn from Waste Lithium Manganese Battery Using the Molten Salt Method

Lithium-ion batteriesLithium-Ion Batteries (LIBs) (LIBs) have a wide range of applications due to their excellent properties, resulting in a sharp increase in the quantity of waste LIBsWaste LIBs. The cathode materialsMaterials of waste LIBsWaste LIBs contain a large amount of metalMetals ions such as cobaltCobalt, manganeseManganese, and nickelNickel. If not properly treated in a timely manner, it can leadLead to resource wasteWaste and environmental pollution. The molten salt methodMolten salt method provides a possibility for the recoveryRecovery of valuable metalMetals materialsMaterials from the cathode of LIBs. In this paper, the feasibility of recovering metallic manganeseManganese through the molten salt methodMolten salt method is analyzed through thermodynamic calculations. The results show that at temperaturesTemperature above 600 ℃, Mn(IV) can spontaneously reduce to Mn(III), and Mn(III) gradually undergoes reduction when a voltage is applied, following the reduction processProcess of Mn(IV) → Mn(III) → Mn(II) → Mn. This paper provides theoretical support for the molten saltMolten salt deoxidation recoveryRecovery of metallic manganeseManganese from lithium manganeseManganese oxide.