Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Centre National De La Recherche Scientifique

Universite Claude Bernard – Lyon1

Universite Dé Lorraine

Cpe Lyon Fcr

Orano

Emmanuel Billy

Richard Laucournet

David Brun-Buisson

Paul-Henri Haumesser

Catherine Santini

Hakima Mendil

Denis Vincent

Sandrine Barthelemy

Nathalie Diaferia

Sophie Legeai

Gaella Frajer

Mathilde Guilpain

Mathias Coudray

Véronique Dufaud

Eric Meux

Natalie Leclerc

Maxime Balva

The invention relates to a method for recycling the electrolyte of a lithium-ion battery and a method for recycling lithium-ion batteries. The method for recycling an electrolyte of the invention is a method for recycling an electrolyte containing a lithium salt of formula LiA, where A represents an anion selected from PF, CFSO, BF, ClOand [(CFSO)]N of a Li-ion battery, characterized in that it comprises the following steps: a) optionally, treatment of the battery in order to recover the electrolyte that it contains; b) addition of water to the electrolyte; c) optionally, when step a) is carried out, filtration (F) in order to separate the liquid phase containing the electrolyte from the solid phase comprising the residues of the battery; d) addition of an additional organic solvent to the liquid phase obtained in step b) or, when step a) is carried out, after the filtration (F) of step c); e) decantation of the liquid phase obtained after step b) of adding water or step d) of adding additional organic solvent, whereby an aqueous phase containing the lithium salt and an organic phase containing the electrolyte solvents and the additional organic solvent are obtained; f) distillation of the organic phase obtained in step e) in order to separate the solvents of the electrolyte and the additional organic solvent; g) precipitation of the anion A of the lithium salt by addition of pyridine followed by filtration (F); h) addition of at least one carbonate salt and/or of at least one phosphate salt to the filtrate obtained in step g) followed by filtration (Fwhereby a lithium salt and water are obtained. The invention finds its application in the field of recycling lithium-ion batteries, and more particularly the electrolyte of such batteries.

Method for recycling the electrolyte of a Li-ion battery and method for recycling Li-ion batteries

Growing community of inventors

Grenoble, France

Emmanuel Billy