Recovery of all-solid-state sodium-ion batteries cathode and solid electrolyte using deep eutectic solvents as green solvents

DESs are for the first time used to achieve efficient recovery of cathode materials and all-solid-state electrolytes in ASIBs under mild, green and natural condition. [Display omitted] •Deep eutectic solvents are firstly used to recover all-solid-state sodium-ion battery cathode and electrolyte.•High metal leaching efficiency is achieved at mild, green and natural condition.•Anti-solvents methods could be used to recover extracted metal at room temperature. All-solid-state sodium-ion batteries (ASIBs) have wide application prospects in the fields of renewable energy and electric vehicles due to their high energy density and long-life cycle. With the rapid development of industrialization, the number of ASIBs will increase, which might result in a significant increase in the price of metal in ASIBs in the near future. Many waste ASIBs would be produced and lead to waste of resources, environmental pollution and health hazards. Therefore, it is of vital important significance to provide a green and efficient method to recover waste ASIBs. Here, we for the first time propose a mild, green and low-cost strategy for recovery of cathode materials and all-solid-state electrolyte from spent ASIBs by using deep eutectic solvents (DESs). Results show that the highest leaching efficiency of Na in ASIBs cathode materials and all-solid-state electrolytes by using DESs is 88.3% and 56.9%, respectively. Moreover, we use a simple anti-solvent approach of recovering the metals in the leachate with low cost at room temperature. This work would provide a mild, green and low-cost strategy from recycling metals in cathode materials and all-solid-state electrolyte from waste ASIBs.