Researchers are now presenting a new and efficient way to recycle metals from spent electric car batteries. The method allows recovery of 100 per cent of the aluminum and 98 per cent of the lithium in electric car batteries. At the same time, the loss of valuable raw materials such as nickel, cobalt and manganese is minimized.
No expensive or harmful chemicals are required in the process because the researchers use oxalic acid -- an organic acid that can be found in the plant kingdom.Researchers at Chalmers University of Technology, Sweden, are now presenting a new and efficient way to recycle metals from spent electric car batteries. The method allows recovery of 100 per cent of the aluminium and 98 per cent of the lithium in electric car batteries.
In Chalmers' battery recycling lab, Rouquette and research leader Martina Petranikova show how the new method works. The lab has spent car battery cells and, in the fume cupboard, their pulverised contents. This takes the form of a finely ground black powder dissolved in a transparent liquid -- oxalic acid. Rouquette produces both the powder and the liquid in something reminiscent of a kitchen mixer.
The latter part of the process, in which the black mixture is filtered, is also reminiscent of brewing coffee. While aluminium and lithium end up in the liquid, the other metals are left in the"solids." The next step in the process is to separate aluminium and lithium. Petranikova's research group has spent many years conducting cutting-edge research in the recycling of metals found in lithium-ion batteries. The group is involved in various collaborations with companies to develop electric car battery recycling and is a partner in major research and development projects, such as Volvo Cars' and Northvolt's Nybat project.
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