Research Projects

The global e-waste crisis is a growing concern, with lithium-ion battery waste being the largest component. This waste, composed of about 50% metals like LiCoO2 and LiMnO2, is primarily produced due to its high energy density and long storage life. The global consumption of Li and Co for LIB production is increasing, with an expected increase in 2025. To address resource constraints, it is crucial to prioritize recovery and reusability. Deep Eutectic Solvents (DES) have emerged as a promising alternative for metal recycling from e-waste. These low melting solvents are made of a combination of Hydrogen Bond Acceptor (HBA) and Hydrogen Bond Donor (HBD), making them easy to prepare and tailored for specific properties. LiCoO2, a common cathode material in LIBs, makes up around 40% of the total composition. The leaching efficiency of Co is largely influenced by DES's reducing power, which can be enhanced by incorporating carboxylic acids with low ionization potential. This research aims to create an innovative ?-keto carboxylic acid-based DES that facilitates sustainable recovery of Co and Li from used cathode materials of LIBs. The process involves selective precipitation using oxalic acid and H3PO4, achieving an environmentally benign and efficient method of recovery. The project adheres to green chemistry principles, reducing chemical synthesis hazard levels and waste production. It also aims to implement the target 12.5 of the UN SDG by 2030, reducing waste generation through prevention, reduction, recycling, and reuse, and maintaining a sustainable environment and circular ecosystem.