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US 7,820,317 B2Granted
Method for the mixed recycling of lithium-based anode batteries and cells
AssigneeRecupyl
InventorsFarouk Tedjar, Jean-Claude Foudraz
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Abstract
The invention relates to a method for treating all types of lithium anode cells and batteries by means of a hydrometallurgical process at room temperature. The treatment method enables cells and batteries comprising a metallic lithium-based anode or an anode containing lithium incorporated in an anodic insertion compound to be treated under safe conditions, thus enabling the metallic casings, electrode contacts, cathode metal oxides and lithium salts to be separated and recovered.
Claims13
Method for hydrometallurgical treatment of cells and batteries comprising at least:
- a lithium-based anode,
- a salt dissolved in an electrolyte, and
- a cathode comprising at least a metal or a combination of metals selected from the group consisting of cobalt, nickel, manganese and iron, for recovering recoverable fractions, the method comprising:
- dry crushing at room temperature in an inert atmosphere,
- treatment by at least magnetic separation and densimetric table followed by an aqueous hydrolysis,
- for the purposes of recovering at least:
- lithium in the form of carbonate or lithiophosphate,
- an anion of the salt dissolved in the electrolyte, and
- a concentrate comprising at least one metal of said cathode,
- wherein the salt dissolved in the electrolyte comprises hexafluorophosphate PF6 anion and hexafluorophosphate PF6 anion is stabilized in an aqueous solution by means of LiCl.
7 more elements
Dependencies are inferred from the claim text.