Tuning Li Leaching from Solid Electrolytes LATP in All‐Solid‐State Lithium‐Ion Batteries by Ternary Component for Green and Efficient Recovery

Achieving high metal leaching efficiency via regulation strategy is essential for minimizing raw material waste and reducing waste generation in hydrometallurgy. However, conventional approaches of tuning temperature and time frequently result in increased equipment corrosion and increased industrial costs. Therefore, recycling waste solid-state battery relies on the development of new tuning strategies. Here, a new strategy is developed to tune the leaching efficiency of metals by amino acid-based low-melting mixture solvents from lithium aluminum titanium phosphate Li_1.3Al_0.3Ti_1.7P₃O₁₂ (LATP) in all-solid-state lithium-ion batteries. This novel strategy demonstrates a more pronounced metal leaching efficiency, resulting in an increase in the highest Li leaching efficiency from 48.0% to 78.2%. In comparison, tunability by solvent types, temperature, and time on Li efficiency is less efficient, with Li efficiency only varying from 44.9% to 52.3%, 37.7% to 51.0%, and 36.8% to 56.3%, respectively.