Advancing Direct Recycling of ILE-Based Li-ion Batteries through Interface-Focused Delamination

Ionic liquid electrolytes (ILEs) offer a safer and more sustainable alternative to conventional organic electrolytes in lithium-ion (Li-ion) batteries. Their low flammability, high electrochemical stability above 4.2 V, and resistance to thermal decomposition make them suitable for applications that require high safety and long-term durability [1]. Conventional electrolytes are highly volatile, which limits their recovery during recycling and often leads to material loss [2]. In contrast, ILEs are less volatile and more thermally stable, creating opportunities for improved electrolyte recovery. Despite these advantages, recycling methods tailored to ILE-based Li-ion batteries remain limited.This work presents an interface-focused delamination method for direct recycling of electrodes from ILE-based lithium-ion batteries. Rather than decomposing binders, the approach weakens adhesion at the current-collector/active-material interface through controlled interfacial modification, thereby allowing clean lifting of CAM or AAM from aluminium or copper foils with minimal damage [3]. Both the active material and current collector are preserved close to their original state, reducing chemical severity and material loss. The study describes the separation mechanism, key operating parameters, and post-separation cleaning, purification, and validation steps, and positions the technique as a scalable pathway for efficient direct recycling of ILE-based cells.