Abstract: A method for opening an electrochemical generator comprising a negative electrode containing lithium or sodium and a positive electrode optionally containing lithium or sodium, the method including the following successive steps: a) immersing the electrochemical generator in a solution comprising an inert liquid and, optionally, a so-called oxidising redox species able to be reduced on the negative electrode so as to discharge the electrochemical generator, b) opening the electrochemical generator, in the solution, with a cutting element having an electrical resistance of between 1 m? and 1 k?, and preferably between 5 m? and 100?.

Abstract: A method for recycling at least one electrode comprising the following successive steps: a) providing at least one electrode comprising a current collector, an active material and, optionally, a binder, b) immersing the at least one electrode in an ionic liquid solution, comprising a solvent ionic liquid, in the presence of ultrasounds, whereby the active material, and optionally the binder, is separated from the current collector.

Abstract: A method for dissolving a positive electrode material of a battery including a step during which the positive electrode material, comprising lithium and optionally cobalt and/or nickel, is submerged in an acid solution having a pH between 0 and 4, the acid solution containing either manganese ions or hydrogen peroxide, by means of which the lithium and optionally the cobalt and/or nickel is dissolved, and the manganese ions are selectively precipitated in the form of manganese oxyhydroxide.

Abstract: A method for securing an electrochemical generator comprising a negative electrode containing lithium or sodium and a positive electrode, the method comprising the following successive steps: a) immersing an electrochemical generator, in an ionic liquid solution comprising a solvent ionic liquid and, possibly, a so-called oxidant redox species able to be reduced on the negative electrode so as to discharge the electrochemical generator, b) opening the electrochemical generator with an electrically-insulating element, opening being carried out in the ionic liquid solution.

Abstract: A method for discharging an electrochemical generator comprising a negative electrode containing lithium or sodium and a positive electrode, the method comprising a step of discharging the electrochemical generator during which the electrochemical generator is brought into contact with an ionic liquid solution comprising a solvent ionic liquid and an electrically-conductive powder so as to discharge it.

Abstract: A method for selectively separating a carbon-containing material from a mixture comprising a positive electrode and a negative electrode originating from electrochemical cells and/or accumulators, the method comprising the following successive steps: a) providing a mixture comprising a positive electrode and a negative electrode, each electrode comprising a current collector, an active material and a binder, the active material of the negative electrode being a carbon-containing material, preferably graphite, b) contacting the mixture comprising the positive electrode and the negative electrode with a separation solution, in the presence of ultrasound, the separation solution comprising a solvent and, optionally, additives, until selectively separating the carbon-containing material from the current collector of the negative electrode, the active material of the positive electrode remaining secured to the current collector of the positive electrode.

Abstract: A method for recycling a battery including the following steps: a) dissolution of a battery waste, for example an electrode, including lithium and a metal selected from cobalt and manganese, such that a solution to be treated containing lithium ions and metal ions is formed, b) addition of a peroxymonosulfate salt to the solution to be treated, the solution to be treated being regulated at a pH ranging from 1 to 4 when the metal is cobalt or at a pH ranging from 0.1 to 2.5 when the metal is manganese, such that the metal ions are selectively precipitated in the form of metal oxyhydroxide, c) separation of the lithium ions from the solution to be treated. Advantageously, the solution further comprises nickel ions.

Abstract: A process for crushing an electrochemical generator comprising a negative electrode containing lithium or sodium and a positive electrode, the method comprising a step, in which the electrochemical generator is crushed in an ionic liquid solution comprising an ionic liquid and a so-called oxidizing redox species that can be reduced on the negative electrode so as to discharge the electrochemical generator.

Abstract: A method for neutralizing an electrochemical generator comprising a negative electrode containing lithium or sodium and a positive electrode, the method comprising a step, in which the electrochemical generator is brought into contact with an ionic liquid solution comprising an ionic liquid and a so-called oxidizing redox species capable of being reduced on the negative electrode so as to discharge the electrochemical generator.

Abstract: Method for extinguishing an electrochemical generator, particularly in the event of a thermal runaway, the electrochemical generator comprising a first electrode and a second electrode, the first electrode being connected to a first terminal and the second electrode being connected to a second terminal or the ground of the electrochemical generator, wherein the process comprises a step in which the electrochemical generator is covered by an ionic liquid solution, the ionic liquid solution comprising an ionic liquid and an active species with extinguishing and/or flame retardant properties. The ionic liquid solution continuously covering the electrochemical generator from the first terminal to the second terminal or from the first terminal to the ground, so as to cool and/or discharge the electrochemical generator.

Abstract: The invention relates to a method for recycling the electrolyte of a lithium-ion battery and a method for recycling lithium-ion batteries.

Abstract: The invention relates to a method for recycling the electrolyte of a lithium-ion battery and a method for recycling lithium-ion batteries.