International Journal Evolving Sustainable and Renewable Energy Solutions
Selective Replenishment of Lithium from Scrap LiFePO4 Batteries by Using Oxalic Acid
Abstract
Abhilash Mishra and Rina Sahu
The growing demand for EVs has led to an increased need for LFP battery recycling technique. This study introduces an innovative oxalic acid-hydrogen peroxide system for selective leaching of lithium from scrap batteries. By optimizing factors like acid concentration, H2O2 volume, pulp density, reaction time, and temperature, a remarkable 99.4% lithium leaching efficiency is achieved with minimal impurity. The optimal conditions for include 10% (w/v) oxalic acid, 5% (v/v) H2O2, 100 g/L pulp density, at speed of 300 rpm, and 60°C temperature for 4 hours. Advanced characterization techniques such as XRD and SEM confirm the purity and morphology of the recovered material. This pioneering approach enables closed-loop recycling of LFP batteries, supporting a circular economy, environmental friendly and reducing waste management challenges, ultimately having significant implications for the electric vehicle industries.