Recent circular economic initiatives have driven the widespread use of lithiumLithium-ion batteriesBattery (LIBsLithium Ion Batteries (LIB)) in consumer electronics, electric vehiclesElectric Vehicles (EVs), and renewable energy storage. End-of-life LIBsLithium Ion Batteries (LIB) contain critical elements, making LIB recyclingRecycling a promising strategy to reduce mining demandsDemand, hazardous waste, and landfill metalsMetals. However, conventional recyclingRecycling methods rely on inorganic acidsAcid and organic solvents, which pose significant environmentalEnvironmental risks. Deep eutectic solventsDeep eutectic solvents (DESs) have emerged as sustainable alternatives. They are mixtures of hydrogen-bond donors and acceptors held together by hydrogen bonding, resulting in thermally and chemically stable, non-flammable, biodegradable, and low-volatility properties. DESs can dissolve metal oxidesMetal oxides without oxidizing or reducing chemicals, making them suitable for LIB recyclingRecycling. Though promising, the application of DESs in LIB recyclingRecycling is relatively new, and fundamental solubilitySolubility data for metal oxidesMetal oxides in these solvents are limited. In this work, we investigate the solubilitiesSolubility of lithiumLithium, nickelNickel, and cobaltCobalt oxides in DESs. Three binary DESs are synthesized and analyzed to determine their density, viscosity, and thermal stability. The solubilitiesSolubility of Li2O, NiO, Ni2O3, CoO, and Co3O4 in these DESs are then evaluated at various temperatures. These results suggest that DESs may selectively dissolve metal oxidesMetal oxides, improving LIB recyclingRecycling efficiency and selectivity.