Centre National De La Recherche Scientifique

Université De Picardie Jules Verne

Cic Energigune

Nadir Recham

Michel Bernard Armand

Jean-Marie Tarascon

Stephane Laruelle

Sylvie Grugeon

Mohamed Ati

Shanmukaraj Devaraj

Michel Armand

Stéphane Laruelle

Josh Kurzman

Montserrat Galceran

Montserrat Casas-Cabanas

Begoña Acebedo

The present arrangement provides compounds (I) AM(YO4)Z(I) that are obtained from precursors of the constituent elements by a method having steps that can include dispersion of the precursors in a liquid support having one or more ionic liquids made up of a cation and an anion the electric charges of which balance out to give a suspension of the precursors in the liquid. The suspension is heated to a temperature of 25 to 380&#xb0; C. and the ionic liquid and the inorganic oxide of formula (I) are separated from the reaction of the precursors.

Method for producing inorganic compounds

A material is made up of particles of an optionally-doped fluorosulphate. The fluorosulphate has a distorted Tavorite type structure of formula (AA')x(ZZ&#x2032;)z(SO)F(I) where A=Li or Na, A&#x2032; 0 a hole or at least one doping element, Z=at least one element selected from Fe, Co and Ni, Z&#x2032;=a hole or at least one doping element, the indices a, b, x, z, s, and f are selected to assure the electroneutrality of the compound and a&#x2267;0, b&#x2267;0, x&#x2267;0, z&#x3e;0, s&#x3e;0, f&#x3e;0, the respective quantities a and b of dopant A and Z&#x2032; being such that the Tavorite type structure is preserved. The material is obtained from the precursors thereof by an ionothermal route or ceramic route in a closed reactor. The material is of particular use as an active electrode material.

Fluorosulphates useful as electrode materials

The invention relates to a method for preparing an alkali metal and transition metal fluorosulfate that is useful as an electrode material in an electrochemical battery that operates by alkali ion exchange. The method includes a first step that involves: preparing a mixture of precursors of elements making up fluorosulfate, placing said mixture in contact with a solid polymer at ambient temperature, subjecting the reaction medium to a heat treatment that aims to melt the polymer, and subsequently reacting the precursors with one another. Said polymer is one that is solid at ambient temperature, has a melting point lower than the reaction temperature of the precursors, is stable at least up to the reaction temperature of the precursors, and is soluble in a nonpolar aprotic organic solvent.

Method for preparing alkali metal and transition metal fluorosulfates

The present invention relates to boron and aluminum complexes, to the preparation thereof, and to the use thereof for solubilizing ionic compounds. The complexes have one of the following formulae: in which D represents B or Al; Rrepresents R, R, NO, CN, C(&#x2550;O)OR, RSO, or RSO; &#x2014;X&#x2014;, &#x2014;X&#x2014;, &#x2014;X&#x2014; and Xeach represent a divalent group &#x3e;C&#x2550;O, &#x3e;C&#x2550;NC&#x2261;N, &#x3e;C&#x2550;C(C&#x2261;N), &#x3e;CRRor &#x3e;SO; &#x2014;Y&#x2014;, &#x2014;Y&#x2014; and &#x2014;Y&#x2014; each represent a divalent group &#x2014;O&#x2014;, &#x3e;N(C&#x2261;N), &#x3e;N(COR), &#x3e;N(SOR), &#x3e;NR, &#x3e;N(COR) or &#x3e;N(SOR); R, Rand Reach represent H, an alkyl group, an aryl group, an alkylaryl group, an arylalkyl group, an oxaalkyl group or an alkenyl group; Rrepresents an alkyl group, an aryl group, an alkylaryl group, a heteroaryl group, an arylalkyl group, an oxaalkyl group, an alkenyl group or an RCH&#x2014; group; Ris a perfluoroalkyl group, a partially fluorinated alkyl group, or a partially or totally fluorinated phenyl group; each of the R'and R&#x2032;groups represents R or F.

Boron or aluminum complexes

Growing community of inventors

Amiens, France

Nadir Recham