236 / 2024-03-14 03:09:17

End-of-Life Lithium-ion Batteries Recycling Study

• Lithium Recovery,• Spent Lithium-Ion Batteries,• Aluminum and Fluorine Removal,• Thermal Treatment,• Electrochemical Purification

5、智慧能源与清洁电力技术 > 1、智能发电与控制技术

Efficient recovery of lithium from spent lithium-ion batteries is crucial for promoting eco-friendly recycling practices. This process involves several sequential steps: shredding de-energized lithium-ion batteries to produce a black mass, washing the black mass to remove aluminum and fluorine, roasting the black mass to generate a reduced black mass, and conducting simultaneous aqueous leaching and electrochemical lithium-ion purification to extract soluble lithium species.



During the purification stage, a voltage of approximately 2.5-6.5 volts is applied, with a current density ranging from 20-1150 mA/cm², across the anode and cathode. This process is facilitated by employing a lithium-ion separator, which typically comprises a flow cell or electrolyzer featuring an anode compartment, a cathode compartment, and a cation exchange membrane.



The cation exchange membrane, constructed from polymeric materials containing fixed negatively charged species such as sulfonic groups, serves to selectively transport positively charged species through. Commonly used brands for such membranes include Nafion^®, Fumasep^®, and Aquivion^®. This setup enables the efficient extraction and purification of lithium species during the recycling process of lithium-ion batteries.



By integrating these techniques and systems, efficient lithium recovery from spent lithium-ion batteries can be realized, thereby advancing eco-friendly recycling practice and promoting sustainable resource management.