Arkema France

Universite De Tours

Grégory Schmidt

Philippe Bonnet

Rémy Teissier

Dominique Deur-Bert

Stéphane Bizet

Bruno Van Hemelryck

Jérôme Chauveau

Laure Timperman

Daniel Lemordant

Sophie Audureau

Mérièm Anouti

Miguel Flasque

Jérémy Bauche

Christopher Berhaut

A mixture including: 99% to 99.9999% by weight of at least one lithium salt A; and 1 ppm to 10,000 ppm by weight of at least one potassium salt B. Also, a battery including at least one electrochemical cell, the electrochemical cell including a negative electrode, a positive electrode and the mixture.

Mixture of potassium and lithium salts, and use thereof in a battery

A method for preparing a compound having the following formula (IV): R—(SO)—NLi—(SO)—F (IV), the method including a step a) of reacting a sulphamide having the following formula (A): R—(SO)—NH(A) with at least one sulphur-containing acid and at least one chlorinating agent, the step a) being carried out: at a temperature between 90° C. and 130° C., and at a pressure which is strictly greater than 7 bar (absolute).

Method for preparing an imide salt containing a fluorosulphonyl group

The present invention concerns a mixture comprising: &#x2014;lithium bis(fluorosulfonyl)imide; &#x2014;lithium 2-trifluoromethyl-4,5-dicyano-imidazole; and &#x2014;lithium hexafluorophosphate; as well as an electrolyte composition comprising said mixture, and their uses.

Lithium salt mixture and uses thereof as a battery electrolyte

A method for drying and purifying a lithium bis(fluorosulfonyl)imide salt. Also, a method for producing a lithium bis(fluorosulfonyl)imide salt which is then dried and purified by the method. Further, a composition containing lithium bis(fluorosulfonyl)imide salt having a water content by mass of between 5 and 45 ppm. And, the use of the composition C in Li-ion batteries.

Method for drying and purifying lithium bis(fluorosulfonyl)imide salt

A lithium salt mixture comprising: from 85% to 99.9 mol % of lithium bis(fluorosulfonyl)imidide; and from 0.1% to 15 mol % of lithium 2-trifluoromethyl-4,5-dicyano-imidazolate. Also, an electrolyte composition containing same and to the uses thereof. Also, an electrochemical cell including a negative electrode, a positive electrode and the electrolyte composition interposed between the negative electrode and the positive electrode. Also, a battery containing at least one electrochemical cell with the electrolyte composition.

The present invention relates to a method for drying and purifying a lithium bis(fluorosulfonyl)imide salt in solution in an organic solvent S1, said method comprising the following steps: a) adding deionised water to dissolve and extract the lithium bis(fluorosulfonyl)imide salt, forming an aqueous solution of said salt; b) extracting the lithium bis(fluorosulfonyl)imide salt from said aqueous solution, using an organic solvent S2, said step being repeated at least once; c) concentrating the lithium bis(fluorosulfonyl)imide salt by evaporating said organic solvent S2 and the water, in a short-path thin-film evaporator, under the following conditions: temperature of 30&#xb0; C. to 95&#xb0; C., pressure of 10mbar abs to 5 mbar abs, residence time no longer than 15 min; and d) optionally crystallising the lithium bis(fluorosulfonyl)imide salt. The present invention likewise relates to a composition made of lithium bis(fluorosulfonyl)imide salt, and the uses thereof in Li-ion batteries.

Method for drying and purifying LiFSI

An electrolytic composition including at least one lithium salt of formula (A) wherein Rf represents a fluorine atom, a nitrile group, an optionally fluorinated or perfluorinated alkyl group having from 1 to 5 carbons, an optionally fluorinated or perfluorinated alkoxy group having from 1 to 5 carbons or an optionally fluorinated or perfluorinated oxa-alkoxy group having from 1 to 5 carbons; and the following solvent mixture: ethylene carbonate, &#x3b3;-butyrolactone, and methyl propanoate. Also, to the use of the compositions in Li-ion batteries.

Improving the ionic conductivity of an electrolyte based on lithium imidazolate salts

The invention relates to the field of storing electrical energy in secondary lithium batteries of the Li-ion type. More precisely, the invention relates to an electrode material for a Li-ion battery, to the method for the production thereof, and to the use of same in a Li-ion battery. The invention also relates to Li-ion batteries produced using said electrode material.

Electrodes of li-ion batteries with improved conductivity

A process for the preparation of a bis(sulphonato)imide salt of formula: (III) (SO)&#x2014;N&#x2014;(SO) 3Cwhere Crepresents a monovalent cation, comprising the reaction of amidosulphuric acid of formula: (I) (OH)&#x2014;SO&#x2014;NHwith a halosulphonic acid of formula: (II) (OH)&#x2014;SO&#x2014;X where X represents a halogen atom, and comprising a reaction with a base which is a salt formed with the cation C. Also, a process for the preparation of bis(fluorosulphonyl)imide acid of formula: (V) F&#x2014;(SO)&#x2014;NH&#x2014;(SO)&#x2014;F and to a process for the preparation of lithium bis(fluorosulphonyl)imide salt of formula: (VII) F&#x2014;(SO)&#x2014;N&#x2014;(SO)&#x2014;F Li.

Process for the preparation of lithium or sodium bis(fluorosulphonyl)imide

Salts of bicyclic imidazole compounds (IV) having general structural formulae in which A represents a monovalent cation, X represents independently a carbon atom, an oxygen atom, a sulphur atom or a nitrogen atom. Also, an associated production method and a use thereof, in particular as an electrolyte component for batteries.

Salt of bicyclic aromatic anions for Li-ion batteries

The present invention relates to a method for preparing a polyinsaturated perfluorinated compound B from a polyinsaturated perhalogenated compound D having the formula CX, in which X is independently selected from one of the halogens, F, Cl, Br or I, provided at least one X is not fluorine; n is the number of carbon atoms and is at least higher than or equal to 4, m is the number of double carbon-carbon bonds and is higher than or equal to 2, wherein the method comprises a step in which compound D is fluorinated in the presence of a fluorinating agent of general formula AF, in which A is hydrogen, an alkali metal or an alkaline earth metal, and p is 1 or 2, and in the presence of an aprotic organic polar solvent; the method being carried out with a molar ratio of AFto compound D of less than 1.45*2(n&#x2212;m+1).

Method for preparing polyunsaturated perfluorinated compounds

The present invention relates to a method for preparing hexafluorobutadiene comprising the following steps: (a) hydrodechlorinating hexachlorobutadiene to form a first stream comprising 1,2,3,4-tetrachlorobutadiene and optionally unreacted hexachlorobutadiene; (b) fluorinating the first stream comprising 1,2,3,4-tetrachlorobutadiene obtained in step (a) to form a second stream comprising 1,1,2,3,4,4-hexafluorobutane, (c) dehydrogenating the second stream comprising 1,1,2,3,4,4-hexafluorobutane to form a third stream comprising hexafluorobutadiene.

Method for preparing hexafluorobutadiene

A composition including: (i) a lithium salt of imidazole compound of formula (I): wherein Rf is a fluorinated alkyl group having 1 to 5 carbon atoms, or a fluorine atom; and (ii) at least one cation selected from the group A including sodium, potassium, calcium, iron, magnesium, manganese, strontium, vanadium, ammonium, silver, aluminium, arsenic, barium, silicon, cadmium, cobalt, chromium, copper, nickel, lead, antimony, selenium, tin, strontium and titanium; and (iii) at least one anion chosen from the group B including fluoride, chloride, nitrate, sulphate, phosphate, trifluoroacetate, pentafluoroacetate and the anion of formula (II), with all the cation(s) and anion(s) being more than 0 wt % and at most 1 wt % of the composition. Also, the preparation of the composition as well as to the use of the composition as a battery electrolyte.

Composition including a pentacyclic anion salt and use thereof as a battery electrolyte

A fluorination process for obtaining fluorinated compounds including at least one fluorosulfonyl group. More particularly, a process for preparing a fluorinated compound of formula (II), including at least one step of reacting a compound of formula (I) with anhydrous hydrofluoric acid in at least one organic solvent, in which R1 is equal to R2 except in the specific case where R1&#x2550;Cl, then R2&#x2550;F, and when R1 is equal to R2, R1 and R2 represent an electron-withdrawing group which has a Hammett parameter &#x3c3;p of greater than 0, such as F, CF, CHF, CHF, CHF, CHF, CHF, CF, CF, CHF, CHF, CHF, CF, CHF, CHF, CF, CFOCF, CFOCF, CHFOCF, CFOCF, CF, CF, CFor CF, and M represents a hydrogen atom, an alkali metal, an alkaline-earth metal or a quaternary ammonium cation.

Method for preparing imide salts containing a fluorosulphonyl group

A method for obtaining salts of bicyclic imidazole compounds (V) having general structural formulae in which A represents a monovalent cation, X represents independently a carbon atom, an oxygen atom, a sulphur atom or a nitrogen atom. Also, the associated production method and to the use thereof, in particular as an electrolyte component for batteries.

Growing community of inventors

Saint Andeol le Chateau, France

Grégory Schmidt