Technology Summary

Penn State researchers are developing an electrochemical leaching method that directly extracts lithium from α phase spodumene without the need for phase transformation, offering a more energy-efficient and environmentally friendly approach to lithium extraction. The system consists of a current collector with lithium-bearing materials, carbon or metal-based electrodes, and an electrolyte. Applying an oxidation voltage to the current collector allows for the electrochemical leaching of lithium ions into the liquid phase. To improve the leaching process, a promoter such as O2, O3, H2O2, and others, can be added. Additionally, a multi-functional current collector with a large surface area and hydrogen peroxide production capability is introduced for scale-up leaching. The method also enables efficient extraction of lithium from various sources other than ores, including from waste streams and recycled materials.