A deep eutectic solvent with high reducibility and low viscosity was successfully prepared by u-sing ascorbic acid,choline chloride and water.Structural characterization of DES using infrared spectros-copy(FTIR)and nuclear magnetic resonance(NMR)spectroscopy for NCM523 cathode material recovery studies.The results show that the DES can achieve 100%extraction efficiency of nickel(Ni),cobalt(Co),manganese(Mn)and lithium(Li)from the cathode material under mild conditions(60℃,20 min).The leached metal ions can be efficiently recycling by the co-precipitation method.Precipitation efficiency of transition metal ions such as Ni,Co,Mn,etc.is more than 90%.The recycling method is sim-ple and cost-effective and can effectively reduce resource depletion as well as environmental pollution.
关键词
低共熔溶剂/废弃锂离子电池/浸出/回收
Key words
deep eutectic solvents/spent lithium-ion batteries/leaching/recycling