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release time:2025-07-10 Hits: Popular:AG11 battery
Recycling Technologies for Liquid Lithium-Ion Batteries
Recycling liquid lithium-ion batteries is critical for recovering valuable materials (lithium, nickel, cobalt, copper) and preventing environmental pollution. Traditional “pyrometallurgical” methods (high-temperature smelting) dominate current practices but face challenges in energy consumption and material purity. Emerging “hydrometallurgical” and “direct recycling” technologies offer more efficient and sustainable alternatives.
1. Pyrometallurgy
Process: Batteries are shredded, dried, and heated to 1,200–1,500°C in a furnace. Metals melt into a slag (cobalt/nickel/copper) and a lithium-rich vapor.
Pros: High scalability for large battery volumes; suitable for mixed battery chemistries.
Cons: High energy use (1,500–2,000 kWh/ton of batteries) and emits toxic gases (e.g., HF, CO) if not properly controlled. Only ~50% of lithium is recovered.
2. Hydrometallurgy
Process: Uses chemical solvents (e.g., sulfuric acid, ammonia) to dissolve electrodes, separating lithium and transition metals via precipitation or ion exchange.
Pros: Lower energy use (~500 kWh/ton) and higher lithium recovery (>90%). Enables production of battery-grade lithium carbonate directly.
Cons: Generates toxic wastewater requiring treatment; sensitive to battery composition variations.
3. Direct Recycling
Innovative Approach: Mechanically separates electrode materials without dissolving them, preserving active materials (e.g., LiCoO₂, NMC) for direct reuse in new batteries.
Key Techniques:
Dry Shredding & Sieving: Separates cathode/anode powders using air classification or electrostatic sorting.
Electrochemical Regeneration: Reactivates degraded electrodes via controlled charging/discharging.
Pros: Lowest energy consumption and waste; maintains material purity for “closed-loop” recycling.
Cons: Currently limited to lab-scale; struggles with adhesive residues and complex electrode structures.
4. Policy and Technology Integration
The EU’s New Battery Regulation (2023) mandates minimum recycling rates (70% for lithium, 95% for cobalt/nickel) by 2030, driving innovation in hydrometallurgy and direct recycling. Companies like Redwood Materials (USA) and Umicore (Belgium) are scaling hybrid recycling systems that combine mechanical sorting with chemical extraction to optimize material recovery.
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