Reclaimed and Up-Cycled Cathodes for Lithium-Ion Batteries.

Area of Science:

• Materials Science
• Electrochemistry
• Sustainable Energy

Background:

• Rising demand for electric vehicles necessitates efficient lithium-ion battery (LIB) recycling.
• End-of-life (EOL) LIBs present a significant waste stream with valuable cathode materials.

Purpose of the Study:

• To evaluate and compare two distinct recycling routes (shredding vs. disassembly) for LIB cathode material reclamation.
• To synthesize an upcycled cathode material from recovered transition metals.
• To assess the purity, performance, and energy efficiency of the recycling processes.

Main Methods:

• Recovery of black mass from LIBs via shredding and disassembly.
• Purification and transition metal reclamation from black mass.
• Synthesis of an upcycled cathode material (LiNi0.6Mn0.2Co0.2O2) using co-precipitation.
• Electrochemical performance testing of the upcycled cathode material.

Main Results:

• Disassembly route produced a purer waste stream with fewer aluminum and copper impurities compared to shredding.
• Upcycled cathode material synthesized from reclaimed metals demonstrated electrochemical performance comparable to as-manufactured materials.
• The study provides a comparative analysis of the two recycling methods based on material purity, cell performance, and energy consumption.

Conclusions:

• The disassembly method is more effective for obtaining purer precursor materials for LIB cathode recycling.
• Recycled cathode materials maintain high electrochemical performance, supporting their viability for reuse.
• This research contributes to developing scalable and sustainable recycling strategies for EOL LIBs.