Techniques for Recycling Lithium-ion Batteries

(Summary) A method for separating and recovering valuable metals like nickel, cobalt, manganese, and lithium from waste ternary lithium batteries. The method uses a strongly-oxidative selective acid like persulfate to leach the battery powder under acidic conditions. The leaching is done in a way that inhibits cobalt and manganese extraction while allowing nickel and lithium extraction. This separates the metals initially. The leaching residue is then processed separately to extract cobalt and prepare active manganese dioxide.

(Summary) A method to recover lithium from lithium-ion battery scrap using water-based techniques. The steps involve calcining the scrap, dissolving lithium in water, extracting and concentrating the lithium, neutralizing and recovering impurities, and carbonating the lithium concentrate to obtain lithium carbonate. This avoids complex chemical processing steps and enables efficient lithium recovery from the calcined battery scrap.

(Summary) A method to recover lithium from lithium ion battery scrap that involves optimized steps to efficiently extract lithium from the scrap with higher purity compared to conventional methods. The method includes calcining the scrap, dissolving the lithium in water, concentrating it through solvent extraction and stripping, neutralizing any impurities like nickel, and finally carbonating to obtain lithium carbonate.

(Summary) Recycling lithium-ion batteries by separating their components to recover valuable metals like cobalt, nickel, manganese, and lithium. The recycling process involves grinding and pyrolyzing the batteries, then electrostatic separation to extract graphite, lithium, and metals from the resulting black mass. This allows recycling of critical battery materials in a way that is efficient, safe, and maximizes recovery of valuable metals.

(Summary) Recycling of lithium ion batteries (LIBs) to recover active cathode materials for use in new batteries. The recycling process involves leaching out cathode materials from spent LIBs, purifying the resulting solution, and then precipitating out recovered cathode precursor particles for sintering into active cathode materials. The improvement is doping the leach solution with small amounts of trace elements like fluorine that increase the percentage of certain oxidation states on the recovered cathode particle surface. This improves battery performance compared to undoped recycled cathodes.

(Summary) A method and apparatus for recovering and reusing valuable metals from discarded lithium-ion batteries is described. The method involves heat treating discarded electrode scraps to remove binders and separating out the metal-containing active material. The active material is then further processed to improve its properties before reuse.

(Summary) Environmentally friendly, cost-effective process for recycling lithium-ion battery electrode materials by removing the polymer binder without damaging the active materials. The method involves soaking the electrode assembly in a solution of lithium alkoxide to decompose the binder. This separates the electrode material from the current collector, allowing recovery of the electrode material for reuse.

(Summary) Extracting and recycling metals from spent lithium-ion batteries using deep eutectic solvents as a more environmentally friendly alternative to pyrometallurgy and hydrometallurgy. The process involves leaching metals from battery waste with deep eutectic solvents containing hydrogen bond donor and acceptor compounds. The dissolved metal ions can be recovered by precipitation or electrodeposition, and reused for new batteries.

(Summary) Method for reusing positive electrode active materials of lithium batteries to extract and recycle valuable lithium and transition metal elements without using acids or solvents. It involves thermal treating electrode scrap to remove binder and collect the active material, washing it with a basic lithium solution, and annealing to produce reusable active material.

(Summary) A green method for efficient and selective extraction of lithium from spent lithium-ion batteries to solve the resource scarcity challenge. The method uses the lithium plating phenomenon that occurs during fast charging of end-of-life batteries to concentrate lithium at the anode/separator interface. This concentrated lithium is then recovered using water as the extraction solvent. The recovery process involves electrochemically charging the spent battery at high rates to induce lithium plating, which deposits metallic lithium at the anode. Extracting the concentrated lithium from the plated film and SEI layer using water only, no acids or bases, achieves over 90% lithium recovery compared to conventional recycling methods.